1.√x^5+x^4y^2 (x≥0,y≥0）2.√12x^3y^5(x≥0,y≥0）3.√2/3 ×√544.√1/7 ×√565.√a ×√a^3b^2(a≥0,b≥0）6.√a/2 ×√4a^2(a≥0）7.√a^3×√ab （a≥0,b≥0)8.2√6xy×（-1/4 √32xy^2) (x≥0,y≥0）会做几道做几道

x*x+2x+y*y-4y+5=0 x= y= 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 4x+2y-5x-y 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) 若实数X,Y满足x²+y²-4x-2y+5=0求√x+y/√8y-2x x*x+y*y-2x+4y+5=0求x, y满足x-y+2≥0,x+y-4≥0,2x-y-5≤0 求X^2+Y^2-10Y+25的最小值 .先化简再求值：（2x+y）（2x+y)-(2x-y)平方其中X,Y满足X平方+Y平方-2X+4Y+5=0 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 已知4x²+y²-4x-6y+10=0求（2/3x（√9x）+(y²√x/y³)×(x²√1/x×5x√y/x)的值 已知4x²+y²-4x-6y+10=0求（2/3x（√9x）+(y²√x/y³)-(x²√1/x-5x√y/x)的值 已知4x²+y²-4x-6y+10=0,求[(2/3)x√(9x)+y²√(x/y³)-(x²√(1/x)-5x√(y/x)的值 {x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 已知 x y 满足约束条件 x-y+5≥0 x+y≥0 x≤3 z=2x+4y的最小值为 已知 x y 满足约束条件 x-y+5≥0 x+y≥0 x≤3 z=2x+4y的最大值为 若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求2x+2√x*√y+3y/x-√x*√y+y