" If,"x+y=8" ,then the maxima of "xy=?

If x + y = 8, then the maximum value of xy is _______

If sqrt((x)/(y)) =(10)/(3) - sqrt((y)/(x)) and x-y=8 , then the value of xy is equal to

If x-2y=11 and xy=8, then the value of x^(3)-8y^(3) is

If (x+y)=8 and xy=15 then the value of (x^3-y^3) is :

If x^2+8y^2-12y-4xy+ 9 = 0 , then the value of (7x - 8y) is: यदि x^2+8y^2-12y-4xy+ 9 = 0 ,तो (7x - 8y) का मान क्या होगा

if (x^(2)+y^(2))/(x^(2)-y^(2))=(17)/(8) then find the value of x:y