( )—(x²+3xy)= -xy—1/3y² 如果x+y=5,则3-x-y+( ) 如果x-y=3
1个回答
(x^2+2xy-1/3y^2)-(x²+3xy)= -xy—1/3y²
如果x+y=5,则3-x-y=(-2 )
如果x-y=3/4,则4(y-x)= ( -3)
相关问题
XY=1,X+Y=3,则3XY+10Y+[5X-(2XY+2Y-3X)]
1/x+1/y=4,则(3x+xy+3y)/(x-xy+3y)=
若xy/x+y=2,则3x-xy+3y/-x+3xy-y=
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
x+y=-5,xy=3,则-x^3y-xy^3+2x^2y^2等于
如果x2+y2=8,x+y=3,则xy=( )
已知1/x-1/y=-3,则x+3xy-y/3x-2xy-3y=
若[1/x+1y]=2,则[2x−xy+2y/3x+5xy+3y]=______
1/x-1/y=3 5x+xy-5y/x-xy-y=
若2/x+2/y=1,则(2x-xy+2y)/(3x+5xy+3y)=?