x³-2x²=?a²-9b²=?5x²y-20y³=?3a&
若集合A={(x,y)|y=x²,x∊R},B={(x,y)|y=2x²+2x-3,x&
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
3x²y(A+2y-3y²)=15x³y+6x²y²+B...求多项式
如果3x²y(A+2y-3y²)=15x³y+6x²y²+B,那麽多项
已知集合A={y|y=log1/2 (x-x²)},B={x|a^(x-3)≤(1/a)^(2x-9),a>0
已知集合A={(x,y)|(y-2)/(x-1)=a+2,x,y∈R},B={(x,y)|(a²-4)x+(a
若A=x³-3x²y+2xy²+3y³,B=x³-2x²y+
已知集合A={y|y=x²-2x},B{x|y=根号(-x²-2x+3)},则A∩B=
已知:6x²-7xy-3y²+14x+y+a=(2x-3y+b)(3x+y+1)求a,b的值
下列计算:①(a²-b²)/(a-b)=a-b;②2y/3x÷(-4y²/9x³
A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y,若x=
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若x