4y+3x/4a,x²-1/x四方﹣1,x²-xy+y²/x+y,a²﹢2ab/
解方程x四方-x²+2xy+y²+1=0 x²+2xy+6x+2y²+4y+10
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
【分解因式】 x²-xy+4分之1y² x²y-2xy²+y³ a(x
(1).设A=2X²-3Xy+y²+X-3y,B=4X²-6xy+2y²+4X-
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
已知A=x³-2y³+3x²y+xy²-3xy+4,B=y³-x
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
⒈-4x^ay+x²y^b=-3x²y,则a+b= ⒉若x+y3,xy=1,则x²+y
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
若A=2x²-4xy-2y²-2x+2y,B=4x²-6xy+2y²-3x-y.
1.设A=2x²-3xy+y²+x-3y,B=4x²-6xy+2y²+4x-y,