(3a-2b)^2*(3a+2b)^2 [1/2x-y)^2+(1/2x+y)^2](1/2x^2-2y^2) (2x^
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.已知集合A={(x,y)|y=2x+1},B={(x,y)|y=x+3},a∈A,b∈B,求a
(x+y)(a-2b)
已知集合A={(x,y)| (y-3)/ (x-1)=2,x,y∈R},B={(x,y)| 4x+ay=16,x,y∈
(3x-y)(3x+y)+y(x+y);(a+1/2b)(a-1/2b)-(3a-2b)(3a+2b)快点,
(1).(x+y)(a+2b)
已知集合A={(x,y)|(y-3)/(x-2)=a+1}B={(x,y)|(a^2-1)x+(a-1)y=15},当a
1.x(x-y)+y(y-x)2.9(a-b)^2-16(a+b)^2 3.25(x-y)^2+10(y-x)+1
计算 1.[(a+b)^2-(a+b)(a-b)]÷(-b) 2.[(x+y)(2x+y)+(x+y)(x-y)]÷3x
分式的通分与约分①:x/a(x-y),y/b(y-x);②:1/x^2-1,2x/x^2-3x+2;
若A={(x.y)|2x+3y=1}.B={(x.y)|3x-2y=3}则A交B等于?