Question

if x-y =3 ,xy=28 ,then what will be the value of x^+y^​

Answer 1

Answer:

65

Step-by-step explanation:

x-y = 3                                   {squaring both sides}

(x-y)^2 = 3^2

x^2 + y^2 - 2xy = 9              { xy = 28}

x^2 + y^2 - 2(28) = 9  

x^2 + y^2 = 65