`x,y in R` with (x>y) such that `x^2 y^2 + x^2 +y^2 + 2xy = 40 and xy + x+y=8` Find x.

If x^(2) + y^(2) =37 and xy = 6 : find x-y

If x^(2) + y^(2) = 37 and xy = 6, find x+y

If x and y be two positive real numbers such that 4x^(2)+y^(2)=40 and xy=6 , then find the value od 2x+y .

If xy=6 and x^2y+xy^2+x+y=63 then x^2+y^2=

If xy = 6 and x^(2) y + xy^(2) + x+y =63 , then the value of x^(2) +y^(2) is

(a) If x : y = 3 : 4 , then find the value of the ratio (2x + y) : ( 9x - 2y) . (b) If x : y = 5 : 4 , then find the value of the ratio (x^(2) + xy) : (x^(2) - xy) .