Question

What number should be added to both sides of the equation to complete the square? x2 – 10x = 7

Answer 1

25

Explanation:

x^2 – 10x = 7

Take the coefficient of x

-10

Divide by 2

-10/2 = 5

Square it

5^2 = 25

Add this to both sides

x^2 – 10x+25 = 7+25