if x-y = 8 and xy = 12 then find value of x^2+y^2 ?? Share with your friends Share 0 Pabita Mahato answered this 2 View Full Answer A.b.kanika answered this If x + y = 8 and xy =15 , find x2 + y2. x + y = 8 xy = 15. Required To Find : x^2 + y^2. SOLUTION : we know that, ( x+y )^2 = x^2 + y^2 + 2xy x^2 + y^2 = ( x + y )^2 - 2xy = 8^2 - 2×15 = 64 - 30 x^2 + y^2 = 34. RESULT : x^2 + y^2 = 34 0