因式分解Z^2(x-y)-4(x-y)-3Z(y-z)

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因式分解Z^2(x-y)-4(x-y)-3Z(y-z)因式分解Z^2(x-y)-4(x-y)-3Z(y-z)因式分解Z^2(x-y)-4(x-y)-3Z(y-z)z^2(x-y)-4(x-y)-3z(

因式分解Z^2(x-y)-4(x-y)-3Z(y-z)
因式分解Z^2(x-y)-4(x-y)-3Z(y-z)

因式分解Z^2(x-y)-4(x-y)-3Z(y-z)
z^2(x-y)-4(x-y)-3z(y-x) =z^2(x-y)+3z(x-y)-4(x-y) =(x-y)(z^2+3z-4) =(x-y)(z+4)(z-1) 只能先把 -3z