若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y=
2个回答
你把X*X+Y*Y看成一个未知数,比如是t,t>=0
原题就是t(t-5)=36
所以是9,舍去了-4这个值
相关问题
证明:若X×X=Y×Y,则X=Y
求函数f(x,y)=x×x×x-y×y×y+3×x×x+3×y×y-9x的极值
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
计算:(x-y)∧3 × (y-x)∧2 × (y-x)∧5
化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]
化简4y×2x+2×2y+y×x,
计算(X+Y)×(X-Y)的平方×(Y-X)的立方×(-X-Y)的4次方
化简求值:(X×根号X+X×根号y)÷(XY-Y²)-(X+根号XY+Y)÷X×根号X-Y×根号Y,其中X=1
(2x-y)^3×(2x-y)×(2x-y)^4
(-x)^2×x^3×(-2y)^3+(-2xy)^2×(-x)^3×y