Question

How would you complete the square on the left side of this equation? x^2-6x=15 A. Add 6 to both sides of the equation. B. Subtract 6 from both sides of the equation. C. Add 9 to both sides of the equation. D. Subtract 9 from both sides of the equation. Please select the best answer from the choices provided A B C D

Answer 1

C. Add 9 to both sides of the equation.

Explanation:

Given

`x^2 - 6x = 15`

Required

Complete the squares

We have:

`x^2 - 6x = 15`

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Take the coefficient of -6 i.e. -3

Square it (-3)^2 = 9

Add 9 to both sides

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Hence, C is correct