把下列各式分解因式:(1)3x2y-6xy (2)5x2y3-25x3y2(3)-4m3+16m2-26m (4)2(a-3)2-a+3 (5)3m(x-y)-2(y-x)2(6)18b(a-b)2-12(a-b)3(7)15x3y2+5x
问题描述:
把下列各式分解因式:
(1)3x2y-6xy
(2)5x2y3-25x3y2
(3)-4m3+16m2-26m
(4)2(a-3)2-a+3
(5)3m(x-y)-2(y-x)2
(6)18b(a-b)2-12(a-b)3
(7)15x3y2+5x2y-20x2y3
(8)6x(x+y)-4y(x+y)
(9)a(x-a)+b(a-x)-c(x-a)
(10)(m+n)(p+q)-(m+n)(p-q)
答
(1)原式=3xy(x-2); (2)原式=5x2y2(y-5x); (3)原式=-2m(2m2-8m+13); (4)原式=2(a-3)2-(a-3)=(a-3)(2a-7);(5)原式=3m(x-y)-2(x-y)2=(x-y)(3m-2x+2y); ...