Question

9. If x + y = 9 and xy = -22, find:
(i) (x - y) and (ii) x2 + y2.​

Answer 1

Answer:

(x+y)²=x²+y²+2xy

9²=x²+y²+2×-22

81+44=x²+y²

x²+y²=125

(x-y)²=x²+y²-2xy

(x-y)²=125+44

(x-y)²=169

x-y=13

Answer 2

Answer:

FIRST Answer =31

second Answer =968

Step-by-step explanation:

(x-y) =9

-22=9

=9-22

=-31

x2+y2

(22) 2+( -22) 2

484+484=968