48.8k views
5 votes
Solve for x. Enter the solutions from least to greatest.
4x²+72x+320 = 0

1 Answer

3 votes

Answer:

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

User Borisrorsvort
by
8.3k points

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