分解公因式:2(m-n)^2-m(m-n) x(x-y)^2-y(y-x)^2 18(a-b)^3-12b(b-a)^2 (2a+b)(2a-3b)-3a(2a+b)
问题描述:
分解公因式:2(m-n)^2-m(m-n) x(x-y)^2-y(y-x)^2 18(a-b)^3-12b(b-a)^2 (2a+b)(2a-3b)-3a(2a+b)
x(x+y)(x-y)-x(x+y)^2
每道题后面都有空格 别看错了
答
2(m-n)^2-m(m-n) = (m-n)[2(m-n)-m] = (m-n)(m-2n)x(x-y)^2-y(y-x)^2 = x(x-y)^2-y(x-y)^2 = (x-y)^2 (x-y) = (x-y)^318(a-b)^3-12b(b-a)^2 = (a-b)^2 [18(a-b)-12b] = 6(a-b)^2(a-3b)(2a+b)(2a-3b)-3a(2a+b) = (2a+...