y=x^2+10x+16 and Y= 2x+4x^2+y^2=5 y=3x-1

y=x^2+10x+16 and Y= 2x+4x^2+y^2=5 y=3x-1 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 数学题x-y=2 and x二次+y二次=16,求x.如题x-y=2x二次+y二次=16求x x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 解方程组 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610（x-y)=3(x+y)+156(x+y)=4(2x-y)+16 解方程组 10（x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610（x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。 (12-2x)/X=(-16-2Y)/Y X^2+Y^2=25 Y 已知x+y=-10,xy=16求x²+y²,(x-y)²,(x+2)(y+2),x²-xy+y².求值！ 填空：x-y/x+y=( )/x^2-y^2 （x-y)2•(y-x)³(x-y)=? y+y'-2y=2x 微分方程y - 2y' + y = x 中级微观经济学选择,Hans has 27 dollars,which he decides to spend on x and y.Commodity x costs $16 per unit and commodity y costs $10 per unit.He has the utility function U(x; y) = 5x^2 + 2y^2 and he can purchase fractional units of x and y.( (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 化简 x / y(x+y) - y / x(x+y) =