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

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(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

(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)(x-2y)-(2x-y)(-2x-y)
=x^2-4y^2-4x^2+y^2
=-3x^2-3y^2
(2a+b)^2-(3a-b)^2+5a(a-b)
=4a^2+4ab+b^2-9a^2+6ab-b^2+5a^2-5ab
=5a

因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( (2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 1、x(x-y)(x+y)-x(x+y)^2 计算：(y-x)^3(x-y)^m-(x-y)^m+2(y-x) 因式分解 1)9x^4-25y^6 2)4x^2+(x+y)^2+4x(x+y) 3)(a+2b)^2-4ab-13b^ 已知集合A={（x,y)| (y-3)/ (x-1)=2,x,y∈R},B={（x,y)| 4x+ay=16,x,y∈ 先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y 设集合A={y|y=x²+2x-3,x∈[-2,2]},B={x|(x-m-1)(x-2m+1) (1)(x^2/x)-y-x-y 设A={(x,y)|y=-2x+3,x,y∈R},B={(x,y)|y=(4-3m^2)x+1,x,y∈R},求A∩B≠ 有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【- 已知【x+y】/【2x+2y】=x+y/2x+2y=1/2 则x,y满足的条件是 A |x+y|＞0 B m-3/m+1