Question

7
7. If x + y =
and xy =
2
5
;
find :
2
(ii) x2 - y2.
(i) x - y​

Answer 1

Step-by-step explanation:

x-y=2

Xy=5

x=5/y

5/y-y=2

5-y/y=2

5-y=2y

2y+y=5

3y=5

y=3/5

put the value in 2x-2y

2x-2(3/5)

2x-6/5

x=6/5/2

x=6×2/5

x=12/5

put the value of x and y in x-y

12/5-3/5

9/5