Question

the arethmatic mean of 3 xy and -3xy is​

Answer 1

Step-by-step explanation:

We have,

AM=3 and GM=1

∴

2

x+y

=3 and

xy

=1

⇒x+y=6 and xy=1

Now, x

2

+y

2

=(x+y)

2

−2xy

=(6)

2

−2(1)

=36−2=34