Class 7 Practice Set 51 | Maths Std 7 | Chapter 14 Algebraic Formulae - Expansion of Squares

This Video explains Chapter 14 Algebraic Formulae - Expansion of Squares Practice Set 51 of Standard 7 for Maharashtra State Board.
Links to previous Practice Set:
Practice Set 50 Part 1 Video Link - • Class 7 Practice Set 5...
Practice Set 50 Part 2 Video Link - • Class 7 Practice Set 5...
Practice Set 50 Part 3 Video Link - • Class 7 Practice Set 5...
#Std7maths #SSC #Pythagoras #Class7
Following questions of Maharashtra State Board Class 7 Maths Solutions Chapter 14 Algebraic Formulae - Expansion of Squares PS 51 have been explained in the video:
Question 1:
Use the formula to multiply the following:
i. (x + y)(x - y)
ii. (3x - 5)(3x + 5)
iii. (a + 6)(a - 6)
iv. (𝑥/5 + 6)(𝑥/5 - 6)
Standard 7 Maths Solutions Chapter 14 Algebraic Formulae - Expansion of Squares Practice Set 51 Question 2:
Use the formula to find the values:
i. 502 × 498
ii. 97 × 103
iii. 54 × 46
iv. 98 × 102
The above questions are based on the expansion formula:
(a + b)(a - b) = a² - b²

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(5a-6b)
(a+b)square=a square +2ab+b square
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25a square +60ab+36square

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