(3x²y)³×(-4x)= (-2a)³·(-3a)²=
(3x²y)³×(-4x)= (-2a)³·(-3a)²=
(x-y)³-x+y (a+b)²-(a-b)² (x-3)³-4x+12
如果3x²y(A+2y-3y²)=15x³y+6x²y²+B,那麽多项
求函数y=1/3x³-1/2(a+a²)x²+a³x+a²的单调递减区
已知|x-y-3|+(a+b+4)²=0,求2a+2b-(a+b)分之(x-y)²-3(y-x)的值
已知集合A={y|y=x²-2x},B{x|y=根号(-x²-2x+3)},则A∩B=
已知集合A={x|-1≤x≤3) B=(y|y=x²,x属于A) C=(y|y=2x+a,x属于A)若满足 C
因式分解:(1)(a+b)²+a+b+1/4 (2)6(x-y)²+3(y-x)³
3a(x+y)-2b(x+y)=(x+y)(?)
设A=2x-3xy+y+x-3y,B=4x-6xy+2y+4x-y,若|x-3a|+(y+3)=0,且B-2A=a.求A
(1).设A=2X²-3Xy+y²+X-3y,B=4X²-6xy+2y²+4X-
已知a(x的m次方y的4次方)³÷(3x²y的n次方)²=4x²y²,