分解因式题.(1)ab(-9a²b²)(2)3x²y-3xy+6y (3)-a²+ab-ac (4)x²y+5xy-y

问题描述:

分解因式题.(1)ab(-9a²b²)(2)3x²y-3xy+6y (3)-a²+ab-ac (4)x²y+5xy-y
分解因式题.(1)ab(-9a²b²)(2)3x²y-3xy+6y (3)-a²+ab-ac (4)x²y+5xy-y (5)-2a³b-6ab+10a²b² (6)3x(x-y)-2y(y-x)

(1)ab-9a²b²=ab(1-9ab) (2)3x²y-3xy+6y=3y(x²-x+2) (3)-a²+ab-ac=-a(a-b+c) (4)x²y+5xy-y=y(x²+5x-1) (5)-2a³b-6ab+10a²b²=-2ab(a²+3-5ab) (6)...第五题写下过程第五题其实不要过程的,直接提取公因式即可(5)-2a³b-6ab+10a²b²= (-2ab)×a²+ (-2ab)×3+ (-2ab)×(-5ab)=-2ab(a²+3-5ab)请再帮忙算一下这道题,也是因式分解3x³y²-4x的5次方y²-11xy³3x³y²-4x的5次方y²-11xy³=xy²(3x²-4x的4次方-11y)