(x+1)(x-1)+2(x+3)=8

问题描述:

(x+1)(x-1)+2(x+3)=8


(x+1)(x-1)+2(x+3)=8,
x^2-1+2x+6=8,
x^2+2x-3=0,
(x+3)(x-1)=0,
x=-3或1.