Question

What is the solution(s) to the equation? Use algebra only, no graphing.
(5x + 15)(x - 7) = 0

Answer 1

x=−3 or x=7

Explanation:

(5x+15)(x-7)=0

5x2−20x−105=0

5(x+3)(x−7)=0

x+3=0 or x−7=0

x=−3 or x=7

Answer 2

x = -3, x = 7

Explanation:

( 5x + 15 ) ( x - 7 ) = 0

5x + 15 = 0

5x = -15

x = -3

x - 7 = 0

x = 7