Question

1 If x - y = 8 and xy = 5, find x2 + y2.​

Answer 1

Step-by-step explanation:

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

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

x^2+y^2=(8)^2+(2)(5)

=64+10

=74

therefore, x^2+y^2=74

Answer 2

Answer:

$x^{2} +y^{2} = (x - y)^2 + 2xy$

$x^{2} +y^{2} = (8)^2 + 2(5)$

$x^{2} +y^{2} = 64+10$

$x^{2} +y^{2} = 74$