Find the value of `(x+y)^(2)+(x-y)^(2)`

If (2x-y) : (5x+3y) = 3:8, then find the value of (x^2+y^2) : (x^2-y^2) . यदि (2x-y) : (5x+3y) = 3:8 है, तो (x^2+y^2) : (x^2-y^2) का मान ज्ञात करें |

if x^(2)+y^(2)+(1)/(x^(2))+(1)/(y^(2))=4 then find the value of x^(2)+y^(2)

If x=2+sqrt(2) and y=2-sqrt(2) , then find the value of (x^(2)+y^(2)) .

If x = cosecA + cosA and y = cosecA - cosA, then find the value of (2/(x+y))^2 +((x-y)/2)^2 -1 . यदि x = cosecA + cosA और y =cosecA - cosA, तो (2/(x+y))^2 +((x-y)/2)^2 -1 का मान ज्ञात करें:

If x^(2)+y^(2)=49 and x-y=3, then find the value of x^(3)-y^(3)

If x/y = 3/2 , find the value of ( x^2 + y^2 ) /( x^2 - y^2 )

If x/y = 6/5 , find the value of ( x^2 + y^2 ) / ( x^2 - y^2 )

If x^(2) + y^(2) = 12 xy , then find the value of (x^(2))/(y^(2)) + (y^(2))/(x^(2)) .