若√3x+2y-5和√2x-y-4.5互为相反数,求³√(xy)的2009次方

若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求2x+2√x*√y+3y/x-√x*√y+y 已知|3x+2y-4|+√(2x-y-5)=0,求实数x和y的值 若|3x-y-1|和√2x+y-4互为相反数,求x+4y的算术平方根. 若|3x-y-1|和√2x+y-4互为相反数,求x+4y的算术平方根 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y. 已知实数x、y满足√x-2y-3+（2x-3y-5）=0求x-8y的平方根和立方根. 若x,y∈{-√3,-1,1,2},则(x,y)∈{(x,y)|x^2+y^2 x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x 若x>o,y>o,且根号x(根号x+根号y)=3根号y(根号x+5根号y)求x+根号xy分之2x-根号xy-5y式子是√x（√x+√y）=3√y（√x+5√y），求x+√xy分之2x-√xy-5y 先化简 再求值 (2x-y)(y+x)-(x-2y)(2y+x)-(-3y+x)^2其(√x+1)+y^2+4=-4y 化简:5(x-y)+2(x+y)-3(x-y) 若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z) 若x、y为整数,√x（√x+√y）=3√y（√x+5√y),试求2x+(√xy)+3y除以x+(√xy)+y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) √x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y (2x-3y)-(5x-y) (2X-3y)-(5x-y) (2x-5y)(3x+y)