Question

Find the values of a and b such that x² + 2x - 7 = ( x + a )² + b

Answer 1

a = 1 , b = -8

Explanation:

(x+1)^2 = x^2+2x+1

x^2+2x+1-8 = x^2+2x-7

Answer 2

a = 1 ; b = - 8

Explanation:

x² + 2x - 7 = (x² + 2x + 1) - 1 - 7 = (x + 1)² - 8

a = 1

b = - 8