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Solving Quadratic Equations By Completing The Square
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- čas přidán 18. 01. 2018
- This algebra video tutorial explains how to solve quadratic equations by completing the square. It contains plenty of examples and practice problems.
How To Solve Simple Quadratic Equations: • How To Solve Simple Qu...
Solving Quadratic Equations By Factoring:
• How To Solve Quadratic...
How To Factor Difficult Quadratic Equations:
• How To Factor Difficul...
Solving QE By Completing The Square:
• How To Solve Quadratic...
Solving Equations In Quadratic Form:
• Solving Equations In Q...
Sum and Products - Quadratic Equations:
• How To Find The Sum an...
_______________________________________
How To Calculate The Discriminant:
• How To Determine The D...
Standard Form to Vertex Form:
• Standard Form to Verte...
Graphing Quadratic Functions:
• Graphing Quadratic Fun...
How To Find The Axis of Symmetry:
• How to Find The Axis o...
Graphing Quadratic Functions - Vertex Form:
• Graphing Quadratic Fun...
Graphing QF in Standard Form:
• Graphing Quadratic Fun...
___________________________________________
Writing Quadratic Equations:
• Writing Quadratic Equa...
Maximum and Minimum Word Problems:
• Maximum and Minimum Va...
Systems of Quadratic Equations:
• Systems of Quadratic E...
Systems of Nonlinear Equations:
• How To Solve Systems o...
Quadratic Inequalities:
• Quadratic Inequalities
Quadratic Equations - Test Review:
• Quadratic Equations Mu...
___________________________________________
Final Exams and Video Playlists:
www.video-tutor.net/
Full-Length Videos and Worksheets:
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Final Exams and Video Playlists: www.video-tutor.net/
you've deadass taught me more in like 5 hours what my maths teacher couldnt in 5 months
Deadass he makes it so simple teachers be struggling
Everybody's busy listening and just vibing with stress
Lmfaoo idk if its just my school but this year specifically has me dead inside and its so hard to focus on this lmfao
same bruv kinda vibing with stress too
@@anonomoususer9331 I've got the opposite. To much focus. Feels like my eyes aren't blinking as much. But also got the dead inside vibe. Look at us-- twinsies.
I dont mean to be off topic but does someone know a method to get back into an Instagram account..?
I somehow forgot the password. I would appreciate any help you can give me
@Dakari Elliot instablaster ;)
You single handedly saved me from my quiz tomorrow. Thank you so much!!
How’d it go?
I don't think there's any better teacher than you👏👏my mathematics and applied science has become so much easier.. thank you so much
My current math teacher is probably one of the best math teachers there are, even amongst social media mathematicians who make sound guides. Alas, my teacher doesn’t make any video guides and have notes that are, for me, hard to follow. So the only way I can learn is by focusing in class which my absent and mathematically impaired mind is not too good at. I have to sporadically seek CZcams guides as a result, lol.
Ive been searching for so many tutorials for this all night and none of them helped me as much as this one. When I tell you I out loud said "oh- i get it" and laughed over how long it took me to realize my mistake 😭😭 thank you so much youve got a new subscriber 🙏
You're the best teacher i have ever seen before.
Never seen you mean? Just kidding. This guy is the faceless goat
yup i'm definitely failing
Did you fail?? 😢
@@TEMPLAR_156 did he fail?
@@shaheerhabib497 never got to know
@@TEMPLAR_156 AHAHAHA gl tho. im giving my gcses rn T-T
Fr
Again, doing a better job explaining this than my math teacher. Left my math class today being totally confused, couldn't figure out the homework, came here, now it's game on for the homework!
this just confused me even more
You just don't know basics
@@aggazaw9008Fr
Just use the formula: a(x + b/2)^2 -(b/2)^2 + c
@@t-sauce2497 what if ax²=bx+c?
like 5x²=2x+1 how to solve this?
@@ZOMBIE_NOTFOUND Bring the 2x term over to the left side by subtracting it from both sides.
5x² = 2x + 1 becomes
5x² - 2x = 1
Take the 5 out
5x² - 2x = 1 becomes
5(x² - (2/5)x) = 1
we can simplify this again by dividing both sides by 5
5(x² - (2/5)x) = 1 becomes
x² - (2/5)x = 1/5
Now you have it in the form you want. Take the -2/5, half it and square it, then add to both sides. -2/5 halfed is -1/5. This -1/5 is the term we want inside the brackets. Squaring that gives (-1/5)^2 = 1/25. So add 1/25 to both sides.
x² - (2/5)x = 1/5
x² - (2/5)x + 1/25 = 1/5 + 1/25
(x - 1/5)² = 1/5 + 1/25
We can simplify the right side by making them have a common denominator. 1/5 = 5/25. so 1/5 + 1/25 = 5/25 + 1/25 = 6/25
(x - 1/5)² = 1/5 + 1/25
(x - 1/5)² = 5/25 + 1/25
(x - 1/5)² = 6/25
Square root both sides.
(x - 1/5)² = 6/25
x - 1/5 = ± sqrt(6/25)
x - 1/5 = ± sqrt(6)/5
Add 1/5 to both sides
x - 1/5 = ± sqrt(6)/5
x = ± sqrt(6)/5 + 1/5
x = (± sqrt(6) + 1)/5
Not the best way to solve an equation like that but I hope it helps.
Dude week u save my grades at least 4 times, cant thank you enough
0:00 Completing the Square
4:14 3x Squared minus 5x is Equal to 10 Solve by completing the Square and factor the Expression
wdym?
His videos about math makes mo comfortabl hehe
congrats on reaching 2M!!!
This method is my strongest and watching this video helped me strengthen completing the square for me thanks
Bruh I've got my last test of the year tomorrow and you helped me understand thanks a million
bro what is going on
this is kinda late, but he does have another video about 30 minutes explaining all the basics. you should watch that and then watch this one. it should clear things up :)
I'm completely lost
thank uuuu this helped alot
U are the best 👏👏
I am really impressed with your teaching skills.How can we see a photo of you?
I learned nothing from this , but heres to adding to the fifteen comments!
It confused me even more.
thank u very much. very helpful
Thank u!
Sir, if these videos help me get a passing grade for my college algebra course, I will kiss your feet.
Thank you so much ❤
Outstanding-I'm teaching my grandson geometry via internet, and we are completing the square in a geometry exercise. we will review your presentation as it is well presented. Thanks.
wait so im doing this with a y= equation (for exapmle: y=x^2 - 6x + 5) and i dont understand what to do because around 1:21 you add 5 and 2^2 what do you do if the thing is y+3^2??
Thanks for sharing! I posted a video on completing the square using remainder theorem. Hope to get your opinion on it.
Where’s the video where you shoe the shortcut when it comes to factoring ?
Thanks so much
thenk you
still don't understand that 3rd one but this helped!
Thanks!
damn
Dawg didn't even thank you 💀
at 2:30 could you simply divide all terms by two instead of factoring out the two?
Yeah I tried it and eventually you get the same answer. imo, just dividing everything by 2 is much faster and easier
Adding this goddamn questions
thank you bro
Thank you
How do you do second provlem!???
Currently crying.
Hey in 5:01 of the video, how are you getting (-5/6)^2?
in order to complete the square, you have to take the middle coefficient (in this case, 5/3) and divide it by 2 and then square it. That would make it ((5/3) x (1/2))^2. This equald (5/6)^2. Hope that helps :)
which app does he use?
21 mins late to my finals, and relying on this 7 minute video currently💯🫡😶🌫️
Giving it up on the fifth minute cuz you just made me forget the rest of the shit I learned, should’ve studied last night fr💀 Goodluck Yall anyways
where is that 2 to square power disappear in the first line in 1:10 for the first example from the left side of the equation..? You mate do not explain this at all... Why?
1:02 i think i was thought a different type of method of this cause I don't understand anything anymore!!!! I know the the formula is (b over 2) therefore -12 ÷ 2 ²= 6² then just continue to divide 6x6 i didn't know you had have find it's root too.... Ugh my brain
for the third exaple,what if the 4 is divisible by 100 which is 3 is not divisible by 145 on the video?what do i do next if 4 is divisible by 100????
did you figure it out?
This is how I’m passing
I don' like those indian teachers
You're the best❤
Here I am doing my homework at 1 am that is due within the next hours
1:05 What is the purpose of taking the square root of both sides? I'm sure there is a good reason but need someone to explain it to me. Thanks
You have to get rid of the ^2 on the left and whatever you do to one side you do to both
2:30 What do you mean you have added 18 to the left side? Do you read these messages? Can you please explain that? Thank you for all you do. You really have a gift of explaining math and taking the fear out of it. My anxiety level drops when I need a video & I see that it is on your channel.
What he means is that because he factored 2 out of the equation, he needs to multiple the number he added by two to balance out the equation.
Victoria5653 pooop
Total Idiot
My alg 1 eoc is in a few days. wish me luck guys!!!
Wait i thought 145 can be simplefied as 5 and 36 is 6 and 6 can be simplefied as 3. So basically the final answer is 2 IS EQUAL TO PLUS AND MINUS 5 OVER 3...✌✌
You can’t simplify the numerator and denominator of a fraction by different numbers, both the top and bottom of the fraction would have to be divisible by 5 or by 3, not both
Can anyone solve the equation 3x² + 6x - 1 = 0, my question is how do you solve it if the square root sign is at the dinaminator?
try using the method of solving the quadratic equation instead
bro u really asked a math problem in the CZcams comments section? 💀💀💀💀 try MATHAWAY
i don't understand the last example..
Just adding to the ten comments.
Just adding to the 5 comments
Time to crunch for final exams tomorrow 😊
im totally bombing my final, amazing resources as always but mannnnnn
huh you lost me
just adding to the 9 comments
Respect
My teacher had taught me to devide all by 2 on the second one
We definitely failing 🗣️🔥🔥
Just use the formula: a(x + b/2)^2 -(b/2)^2 + c
@@t-sauce2497 the thing is they ask you specifically to solve by completing the square
2:22 nice
dam bruh i need an explaination on question like "Express each of the folloing in the form of a-p (x + q)^2"
This makes zero sense
yup, i'm definitely failing
Just use the formula: a(x + b/2)^2 -(b/2)^2 + c
The second question it's wrong sir . answers are -7 and 1
why not have some equations that don't equal zero, there was one ,yea, but i need help rewriting the equation so i can solve it
Just add/subtract both sides to make one side 0.
Just adding to the 6 comment
Vro why he subtract it to two in 1:23
@@sizell4096 2-2 is 0 so cancel then 3-2 is 1 thats why x=1
How do he possibly get 18 in the second equation
he got it from multiplying 2 x 3^2, for some reason this guy doesn't explain anything
Bhai kuch samajh nahi aaya
Panget fighting!
Yeahhhh I’m lost
but 3 not a perfect square tho ????
what.
Just use the formula: a(x + b/2)^2 -(b/2)^2 + c
The problem is he never explains conceptually what's going on, he just explains the math steps
who else feels like an idot for having to watch this
watching this video because im high as fucking hell and I have a test in a minute so I cannot remember anything
Why did I even chose STEM fck
I'm told it gets better, and by better I mean worse. Supposedly there's a pot of gold at the end of this rainbow though.
Just adding to the 1 comment
anyone else here from calc ii?
Calc 3 😢
This led me astray anyone have help? I watched this video and now I understand this topic way less
bruh huh
I hate math, like actually hate this stuff now. Im trying to solve a logarithm and cant get the quadratic
the second equation is wrong i guess cause u changed the 12x to 6x for no reason
I have an Algebra test in exactly 2 hours and 19 minutes…if that’s not a reason to be on yt then idk what is 💀
Bruh this unit is so whack 🤦♂️🤦♂️🤦♂️🤦♂️🤦♂️🤦♂️🤦♂️
Youre just doing things without explaining it
exactly, im trying to figure out how he got these numbers
10 seconds in and i’m lost 🧍🏾♀️