Question

Solve for x. Enter the solutions from least to greatest.
4x²+72x+320 = 0

Answer 1

Solutions of x are -8 and -10.

Step-by-step explanation:

4x^2 + 72x + 320

4x^2 + 40x + 32x + 320

4x( x + 10 ) + 32( x + 10 )

(4x + 32)(x + 10)

Smaller solution :

x + 10 = 0

x = -10

Larger solution :

4x + 32 = 0

4x = -32

x = -32/4 = -8