解方程(x-1) (x-2)=3(x-2)(x-3 - 知识问答

解方程(x-1) (x-2)=3(x-2)(x-3)+20

5个回答

解
(x-1)(x-2)=3(x-2)(x-3)+20
x²-3x+2=3(x²-5x+6)+20
x²-3x+2=3x²-15x+38
2x²-12x+36=0
x²-6x+18=0
(x²-6x+9)=-9
(x-3)²=-9
无解

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