因式分解法解下列方程,1.x(x-3)=x 2.x²-6x+9=0 3.2(x+2)²-8=0 4.(2x-5)²-(x+4)²=05.x²+3x=0 6.x²-4x=0

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因式分解法解下列方程,1.x(x-3)=x 2.x²-6x+9=0 3.2(x+2)²-8=0 4.(2x-5)²-(x+4)²=05.x²+3x=0 6.x²-4x=0
因式分解法解下列方程,
1.x(x-3)=x 2.x²-6x+9=0 3.2(x+2)²-8=0 4.(2x-5)²-(x+4)²=0
5.x²+3x=0 6.x²-4x=0

因式分解法解下列方程,1.x(x-3)=x 2.x²-6x+9=0 3.2(x+2)²-8=0 4.(2x-5)²-(x+4)²=05.x²+3x=0 6.x²-4x=0
1.x(x-3)=x
x(x-3)-x=0
x(x-3-1)=0
x=0或x=4
2.x²-6x+9=0
(x-3)²=0
x=3
3.2(x+2)²-8=0
2((x+2)²-4)=0
2(x+2+2)(x+2-4)=0
x=-4或x=2
4.(2x-5)²-(x+4)²=0
(2x-5+x+4)(2x-5-x-4)=0
(3x-1)(x-9)=0
x=1/3或x=9
5.x²+3x=0
x(x+3)=0
x=0或x=-3
6.x²-4x=0
x(x-4)=0
x=0或x=4

1.x(x-4)=0 x=0或4,
2.(x-3)²=0,x=3,
3.全部拆开:2x²+8x=0即 x²+4x=0即x(x+4)=0,x=0或4.
4.全部拆开再合并: 3x²-28x+9=0,即(x-9)(3x-1)=0,x=9或1/3.
5.x(x+3),x=0或-3
6.x(x-4)=0,x=0或4.
希望对你有用!