(1)x(y-5)+2(5-y) (2)(2a-3b)(2a+b)-5a(b+2a)

问题描述:

(1)x(y-5)+2(5-y) (2)(2a-3b)(2a+b)-5a(b+2a)
(1)x(y-5)+2(5-y) (2)(2a-3b)(2a+b)-5a(b+2a)
(3)(m-2n)^2-n^2 (4)x^4-16x^2y^2 (5)9-12(x-y)+4(x-y)^2

(1)x(y-5)+2(5-y)=(y-5)(x-2)(2)(2a-3b)(2a+b)-5a(b+2a)=(2a+b)(2a-3b-5a)=3(2a+b)(a+b)(3)(m-2n)^2-n^2=(m-2n-n)((m-2n+n)=(m-3n)(m-n)(4)x^4-16x^2y^2=(x²-4xy)(x²+4xy)=x²(x-4y)(x...