Question

3(х +
1)(х - 1) = 2(х - 2)(х + 2) + х2 + 2х 

Answer 1

6х-3=4х-8+2х+2х
2х=-5
х=-2,5

Answer 2

3(x^2 -1) = 2(x^2 -4) +x^2 +2x
3x^2 -3 = 2x^2-8 +x^2 +2x
3x^2 -3x^2 - 2x  = 3 -8
-2x  = -5
  x = 2,5