Question

(x + y) = 7 and xy = 10, find (x – y) and (x2 – y2).

Answer 1

Answer:

x-y=2

x²-y²=16

Step-by-step explanation:

x=3

y=5

Answer 2

Answer:

x = 5 or 2 and y = 2 or 5

Step-by-step explanation:

Using hit and trial method,

we get x = 2 or 5

and y = 5 or 2

Case 1 when x = 2 and y = 5

x - y = -3

x² - y² = -21

Case 2

when x = 5 and y = 2

x - y = 3

x² - y² = 21

Thank you.