3x-12x^2分解公因式(1)3x-12x^2(2)x(x-y)+y(y-x)

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3x-12x^2分解公因式(1)3x-12x^2(2)x(x-y)+y(y-x)3x-12x^2分解公因式(1)3x-12x^2(2)x(x-y)+y(y-x)3x-12x^2分解公因式(1)3x-1

3x-12x^2分解公因式(1)3x-12x^2(2)x(x-y)+y(y-x)
3x-12x^2分解公因式
(1)3x-12x^2
(2)x(x-y)+y(y-x)

3x-12x^2分解公因式(1)3x-12x^2(2)x(x-y)+y(y-x)
3x-12x^2=3x(1-4x)
(2)x(x-y)+y(y-x)=(x-y)^2

(1)3x-12x^2=3x(1-4x)
(2)x(x-y)+y(y-x)=x(x-y)-y(x-y)=(x-y)(x-y)=(x-y)²