求求求,已知(2cx+3y-5)^4+(x-3y-4)²=0,求(xy)³×y²,
求求求,已知(2cx+3y-5)^4+(x-3y-4)²=0,求(xy)³×y²,
已知X²+3XY-4Y²=0(Y≠0)求X-Y/X+Y
已知(x+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知;x+y=4,x-y的绝对值=6,求xy(y的平方+y)-y的平方(xy+2x)-3xy
已知(x+2)*+|y+1|=0求5xy*-{2x*y-【3xy*-(4xy*-2x*y)】}的值
已知2x+y=0,求x-2y/x²+xy*(x²-y²)/x²-4xy+4y
已知(x+3)+丨X-y+10丨=0 ,求5x²y-[2x²y-(3xy-xy²)-3x&
已知3x+4y=0(x≠0),求2xy+y
已知x,y>0 2x+y+3=xy 求5x+4y最小值
已知x²+y²-2x+4y+5=0,求(x²-xy)分之y减去(xy-x²)分之
已知x²+y²-4x-2y+5=0,求代数式[(√x-√y)²+4√xy]/(x+√xy)