3(x-3)=(x-3)² 4x²-（x-1）²= - 知识问答

3(x-3)=(x-3)² 4x²-（x-1）²=0 用因式分解

2个回答

1)3(x-3)=(x-3)²
(x-3)²-3(x-3)=0
(x-3)(x-3-3)=0
x1=3 x2=6
2)4x²-（x-1）²=0
(2x+x-1)[2x-(x-1)]=0
(3x-1)(x+1)=0
x1=1/3 x2=-1

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