Question

解方程:3(x-1)^2=5(x-1)(x+1)-2x(x+1)

Answer 1

3(x-1)^2=5(x-1)(x+1)-2x(x+1)

3（x^2-2x+1）=5（x^2-1）-2x^2-2x

3x^2-6x+3=5x^2-2x^2-5-2x

-6x+3=-5-2x

4x=8

x=2