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

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

(x-1)(x+3)+2(X+3)=8
x²+2x-3+2x+6=8
x²+4x-5=0
(x+5)(x-1)=0
x=-5,x=1

(x-1)(x+3)+2(X+3)=8
x²+2x-3+2x+6=8
x²+4x-5=0
(x-1)(x+5)=0
x=1或x=-5

这个题有两个答案，分别是1和-5

(x-1)(x+3)+2(X+3)=8是错的，(x-1)(x+3)+2(X+3)应该等于2x+9