已知x=1/2-√3,y=1/2+√3,5x²+xy+5y²=
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
已知x+y=3 xy=-5 求x设abc=1 求x²+3xy+2y²/x²y+2xy
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知1/x+1/y=5 求2x-3xy+2y/3x+2xy+3y
已知1/x-1/y=3,求x-2xy-y/5x+3xy-5y的值
已知1/x+1/y=3,求(3x-5xy+3y)/(x-2xy+y)
已知1/X-1/Y=-2,求3X-5XY-3Y/-X+3XY+Y的值
已知1/x+1/y=5,求x+2xy+y/2x-3xy+2y的值
已知1/x+1/y=5 求2x-3xy+2y/x+2xy+y
已知:1/X+1/Y=5,求 2x-3xy+2y/x+2xy+y的值,
已知(x+1)²+|y-1|=0,求2(xy-5xy²)-(3xy²-xy)得值
1/x+1/y=5,求2x-3xy+2y/x²+xy+y的值