3x²-3y²-8xy怎样化简
怎样因式分解5x²+6xy-8y²-3x+8y-2
化简求值3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²其中x=3、y=-1
化简求值3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy² ,当x
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,
化简求值:(-1/3XY)²[xy(2x-y)-2x(xy-y²)],其中X=-3/2,Y=-2
化简求值[1-(2x/x+y)]÷ (x²-2xy+y²/3x+3y)+(x²+xy/x&
-4x²y-8xy²+2x²y-3xy²
请帮忙化简:3(2x²y-3xy²)-2(2xy²-3x²y)
化简求值(x²-4y²)/(4x²-8xy)其中x=2,y=-3
化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,
去括号并化简1.4xy²-3x²y-{3x²y+xy²-[2xy²-4
3x-2xy-8-2x+6xy-x²+6、-x²+2xy-y²-3x²-2xy+