(初二上)提公因式法分解因式:1.(x+y)^2-3(x+y) 2.3x(x-y)+2x(y-x)-y(x-y) 3.m^n(m-n)^2-2mn(n-m)^2

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(初二上)提公因式法分解因式:1.(x+y)^2-3(x+y) 2.3x(x-y)+2x(y-x)-y(x-y) 3.m^n(m-n)^2-2mn(n-m)^2

(初二上)提公因式法分解因式:1.(x+y)^2-3(x+y) 2.3x(x-y)+2x(y-x)-y(x-y) 3.m^n(m-n)^2-2mn(n-m)^2
(初二上)提公因式法分解因式:
1.(x+y)^2-3(x+y) 2.3x(x-y)+2x(y-x)-y(x-y) 3.m^n(m-n)^2-2mn(n-m)^2

(初二上)提公因式法分解因式:1.(x+y)^2-3(x+y) 2.3x(x-y)+2x(y-x)-y(x-y) 3.m^n(m-n)^2-2mn(n-m)^2
1、(x+y)(x+y-3)
2、(x-y)(3x-2x-y)=(x-y)(x-y)=(x-y)²
3、m(m-n)²[m^(n-1)-2n]

  1. (x+y)(x+y-3)

  2. 3x(x-y)-2x(x-y)-y(x-y)=(x-y)(3x-2x-y)=(x-y)(x-y)=(x-y)²

  3. m^n(m-n)^2-2mn(m-n)²=m(m-n)²[m^(n-1)-2n]