Question

15. If x - y = 7 and xy = 9, find the value of (x+y).​

Answer 1

Answer:

There is more clear answer in pic given below

Step-by-step explanation:

x−y=7;xy=9

As we know

(x−y)

2

=x

2

+y

2

−2xy

7

2

=x

2

+y

2

−2(9)

49+18=x

2

+y

2

67=x

2

+y

2