(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
问题描述:
(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
答
(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
=(x-y)²-2(x-y)+(x-y)-5(x-y)
=(x-y)²-(x-y)-5(x-y)
=(x-y)²-6(x-y)
=(x-y)(x-y-6)-(x的2次方y+3xy-4)+3(x的2次方y-xy+2)