Question

Which quadratic equation is equivalent to (x + 2)2 + 5(x + 2) – 6 = 0?

Answer 1

C

Explanation:

u2 + 5u – 6 = 0 where u = (x + 2)

ED 2021

Answer 2

x² + 9x + 8 = 0

Explanation:

A quadratic equation is expressed this way: ax² + bx + c = 0

So, so find the quadratic equivalent of (x + 2)² + 5(x + 2) – 6 = 0, we just have to do the multiplications then simplify.

(x + 2)² + 5(x + 2) – 6 = (x² + 4x + 4) + (5x + 10) - 6

After merging the terms of same degree, we get:

x² + 9x + 8 = 0