1 （2x-3y)^2(2x+3y)^2 2 (2x+y-1)(2x+y+y) 3 (2+xy)(xy-2)-(-2+xy)^2 4 (a+3b)^2-(2a-3b)(3b+2a)麻烦给详解

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1 （2x-3y)^2(2x+3y)^2 2 (2x+y-1)(2x+y+y) 3 (2+xy)(xy-2)-(-2+xy)^2 4 (a+3b)^2-(2a-3b)(3b+2a)麻烦给详解
1 （2x-3y)^2(2x+3y)^2 2 (2x+y-1)(2x+y+y) 3 (2+xy)(xy-2)-(-2+xy)^2 4 (a+3b)^2-(2a-3b)(3b+2a)
麻烦给详解

1 （2x-3y)^2(2x+3y)^2 2 (2x+y-1)(2x+y+y) 3 (2+xy)(xy-2)-(-2+xy)^2 4 (a+3b)^2-(2a-3b)(3b+2a)麻烦给详解
1.（2x-3y)^2(2x+3y)^2
=[（2x-3y)(2x+3y)]^2
=(4x^2-9y^2)^2
=16x^4-72x^2y^2+81y^4
2.(2x+y-1)(2x+y+y)题目是不是打错了应该是(2x+y-1)(2x+y+1)吧
=（2x+y)^2-1
=4x^2+4xy+y^2-1
3.(2+xy)(xy-2)-(-2+xy)^2
=(x^2y^2-4)-(x^2y^2-4xy+4)
=x^2y^2-4-x^2y^2+4xy-4
=4xy-8
4.(a+3b)^2-(2a-3b)(3b+2a)
=a^2+6ab+9b^2-4a^2+9b^2
=18b^2-3a^2+6ab
挺费事的.

x(x-y)2-(y-x)3 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值计算：x+2y/x-y+2x/y-x-3y/x-y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) (3x-y)^2+(3x+y)(3x-y),x=1,y=-2 二元一次方程：2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y (Y-X)^3*(X-Y)^m+(X-Y) ^m+1*(Y-X)^2 (x-y)^2+(x+y)(x-y) 其中 X =3 Y=-1