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