把下列各式分解因式:(1)-8a的3次方b²+12ab的3次方c(2)3a(x-y)+9(y-x)
问题描述:
把下列各式分解因式:(1)-8a的3次方b²+12ab的3次方c(2)3a(x-y)+9(y-x)
(3)(2m-3n)²-2m+3n(4)16mn的4次方-m
答
(1)-8a的3次方b²+12ab的3次方c=-4ab²(2a²-3bc)(2)3a(x-y)+9(y-x)=3a(x-y)-9(x-y)=3(x-y)(a-3)(3)(2m-3n)²-2m+3n=(2m-3n)²-(2m-3n)=(2m-3n)(2m-3n-1)(4)16mn的4次方-m=m(16n^4-...