解方程:3(x+1)(x-1)-3(x-1)^2+2=8 帮帮忙!

2025-05-21 08:00:10
推荐回答(4个)
回答(1):

解:3(x+1)(x-1)-3(x-1)^2+2=8
3(x-1)[(x+1)-(x-1)]=6
6(x-1)=6
x=2

回答(2):

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

(x +1)(x-1)-(x-1)^2=2
x²-1-x²-1+2X=2
2x=4
x=2

回答(3):

回答(4):

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

3(x²-1)-3(x²-2x+1)-6=0
3x²-3-3x²+6x-3-6=0
6x=12
x=2