A={x||x-3|>2},B={y|y=2x^2-6x+3,-1
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
如果分式3x-6y/x+y=0,那么x,y 应满足 A、x=2y B、x≠-y C、x=2y且x≠-y D、x=2y且y
已知集合A={(x,y)| (y-3)/ (x-1)=2,x,y∈R},B={(x,y)| 4x+ay=16,x,y∈
已知:6x²-7xy-3y²+14x+y+a=(2x-3y+b)(3x+y+1)求a,b的值
A={x||x-3|>2},B={y|y=2x^2-6x+3,-1
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
3a(x+y)-2b(x+y)=(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
若集合A={(x,y)|y=x²,x∊R},B={(x,y)|y=2x²+2x-3,x&
已知3x+2y=a,2x+3y=b,则(x+y)(x-y)=?
设A={(x,y)|3x+2y=1},B={(x,y)|x-y=2},C={(x,y)|2x-2y=3},D={(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