Question

xy=18 and x2 + y2=85 find x-y

Answer 1

Step-by-step explanation:

GIVEN THAT

x^2 + y^2 = 85 ---->[eq 1]

xy = 18 ------>[eq 2]

by the formula (x-y)^2

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

= 85 - 2(18)

= 85 - 36

(x-y)^2 = 49

x-y = (49)^1/2

x- y = 7

I WILL BE HAPPY IF THIS ANSWER HELPED U