How to Derive the Quadratic Formula by Completing the Square

In this maths tutorial, we showed how to derive the quadratic formula by completing the square in a step by step approach.
If you have not seen any of our tutorials on different factoring techniques and how to use them to solve quadratic equations together with completing the square method, here are the links to them:
1) How to Solve Quadratic Equations by Factoring Part 1 👇
• How to Solve Quadratic...
2) Factoring Trinomials of the Form x²+bx+c👇
• Factoring Trinomials (...
3) Factoring Trinomials of the Form ax²+bx+c 👇
• Factoring Trinomials
4) Factoring Quadratic Expressions Which are Difference of Two Squares 👇
• Factoring | Quadratic ...
5) Factoring Trinomials Which Factor as Perfect Squares 👇
• Factoring Trinomials |...
6) How to Solve Quadratic Equations by Factoring Part 2 👇
• How to Solve Quadratic...
7) Solving quadratic equations by the square root property 👇
• Solving Quadratic Equa...
8) Adding a constant k to make a perfect square 👇
• How to Find the Value ...
9) How to solve quadratic equations by completing the square 👇
• How to Solve Quadratic...
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