`x^2 + y^2 = 9 and xy = 8` then `x + y` is equal to

If x^(2) + 9y^(2) = 6xy , then what is y : x equal to ?

If x^2+9y^2=9 and xy=1 then (2x+6y)^2

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

If 9x^2+y^2=37 and xy = 2 , x, y> 0 , then the value of (27x^3+y^3) is : यदि 9x^2+y^2=37 और xy = 2 , x, y> 0 , तो (27x^3+y^3) का मान ज्ञात कीजिए ।

If sin (xy) + (x)/(y) =x^(2) - y , " then " (dy)/(dx) is equal to