Solving Quadratic Equations by Completing the Square - 1

mathworksheets (66) in steemiteducation • 7 years ago

In this lesson I will solve a simple quadratic equation by completing its square. I will do it in steps so that students can see and understand the steps needed to solve the equation. Following is a solved example;

I will solve multiple quadratic equations by stepping up the difficulty level each time. If students only learn these solved examples, they become very smart in solving quadratic equations and overall solving of all types of equations.

Below are the links to my previous posts on quadratic equations;

https://steemit.com/steemiteducation/@mathworksheets/completing-the-square-of-a-quadratic-equation-algebrically

https://steemit.com/steemiteducation/@mathworksheets/completing-the-square-of-a-quadratic-function-geometrically

https://steemit.com/steemiteducation/@mathworksheets/how-to-solve-quadratic-equations-using-the-factoring-method

https://steemit.com/steemiteducation/@mathworksheets/graphing-the-simplest-quadratic-function

https://steemit.com/steemiteducation/@mathworksheets/quadratic-functions-an-introduction

steemiteducation math quadratic-equations completing-square algebra

7 years ago by mathworksheets (66)

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justyy (82) · 7 years ago

just use the equation : x=(-b+-sqrt(b^2-4ac)) / 2a

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mathworksheets (66) · 7 years ago (edited)

Thanks for your feedback @justyy; but students are often asked to solve quadratic equations without using the formula. Also the above formula is derived by completing the square of ax² + bx + c = 0.