Question

X-y=9 ,xy =16 then what is value of x^2+y^2=?

Answer 1

Step-by-step explanation:

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

9^2=x^2+y^2-2(16)

81=x^2+y^2-32

81+32=x^2+y^2

113=x^2+y^2