Question

X^2+(x-5)=3x+10
Prove x=+15, -15

Answer 1

x = 5, x = -3

Explanation:

x²+(x-5)=3x+10

x² + x - 5 = 3x + 10

x² + x - 3x - 5 -10 = 0

x² - 2x - 15 = 0

(x -5)(x + 3) = 0

x = 5, x = -3