If x = -2 and `x^(2) + y^(2) + 3xy = -5` , then find y .

If x^(2) + y^(2) -3xy = 0 and x gt y then find the value of log_(xy)(x-y) .

(i) If x and y both are positive and (2x^(2) - 5y^(2)) : xy = 1 : 3 , find x : y . (ii) Find x , if 16((a - x)/(a + x))^(3) = (a + x)/(a - x) .

If x + y = 3 , x^2 + y^2 = 5 , then find the value of xy

(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) .

If x^(2)+y^(2)-3xy = 0 and x gt y then find the value of log_(xy)(x-y)^2

if (3x-2y):(5x-7y)=5:3 then, find x:y.

If x+ y= (7)/(2) and xy= (5)/(2) , find x-y

If (5x+7y):(3x+11y)=2:3 , then find x:y.