Question

If x+y=9 and xy= -22, find:
(x-y)​

Answer 1

Answer:

x=11 and y=-2

Step-by-step explanation:

x-y=13

I hope my ans is correct

Answer 2

Step-by-step explanation:

Equation........ =_____=

x+y = 9

y = 9 - x

xy = -22

x (9-x)= -22

9x -x^2 = -22

x^2 -9x -22 = 0

2 cases

9 +/- √81+88/2

9 +/- √169/2

9 +13/2 or 9 - 13/2

22/2 or -4/2

11 or -2

again 2 cases

if x = 11 or if x = -2

x+y = 9 or x+y = 9

y = -2 or y = 11

again 2 cases

If x = 11 and y = -2 or if x= -2 and y =11 then, then,

(x-y) (x-y)

(11-2) (-2-11)

9 (-13)

Hope it helps uh!