Question

X-y=3 and xy=28 than find x2+y2=?

Answer 1

hlo

(x-y)^2 = x^2 + y^2 - 2xy

( 3 )^2 = x^2 + y^2 - 2× 28

9 = x^2 + y^2 - 56

9 + 56 = x^2 + y^2

65

hope it helps..♥