Question

因式分解 难难难难1.ax+ay-bx-by2.2bm-15bm+4am-30am3.a^2-3a-ab+3b4.m^3

Answer 1

1.=a(x+y)-b(x+y)=(a-b)(x+y)2.=2m(b+2a)-15m(b+2a)=-13m(b+2a)3.=a(a-3)-b(a-3)=(a-b)(a-3)4.=m^3+2m^2-2m-4=m^2(m+2)-2(m+2)=(m^2-2)(m+2)5.=abc^2-abd^2+a^2cd-b^2cd=ac(bc+ad)-bd(bc+ad)=(ac-bd)(bc+ad)6.=1-xy-...