(3x+1)^2(3x-1)^2 (x-2y)(x+2y)-(x+2y)^2 -36a^2+12ab-b^2 (2m-3n)^2-_其他解答

(3x+1)^2(3x-1)^2 (x-2y)(x+2y)-(x+2y)^2 -36a^2+12ab-b^2 (2m-3n)^2-2m+3n (x+2y)(x-2y)-(2x-y)(-2x-y)
(2a+b)^2-(3a-b)^2+5a(a-b)
(3x+1)^2(3x-1)^2 (x-2y)(x+2y)-(x+2y)^2 -36a^2+12ab-b^2 (2m-3n)^2-2m+3n (x+2y)(x-2y)-(2x-y)(-2x-y) (2a+b)^2-(3a-b)^2+5a(a-b)要过程

人气：470 ℃　时间：2020-03-27 01:42:32

解答

(3x+1)^2(3x-1)^2 =[(3x+1)(3x-1)]^2=(9x^2-1)^2=81x^4-18x^2+1(x-2y)(x+2y)-(x+2y)^2 =(x+2y)(x-2y-x-2y)=-4y(x+2y)=-4xy-8y^2-36a^2+12ab-b^2=-(36a^2-12ab+b^2)=-(6a-b)^2(2m-3n)^2-2m+3n =(2m-3n)(2m-3n-1)(x+2y...