Question

what is the expansion of (p+q+3)^2​

Answer 1

Answer:

( pq +10 q 3p 1 ) n

if there a term pq

then let this term be.

= n C r ( p 1/2q 1/2 ) r

( q 3/10p 7/10 ) n−r

Now in this term power of p is 1107n

= 107r

= 21

r+1...... (1)

Now in this term power of q is 1

10

3n

−

10

3r

=

2

1

r−1 ...... (2)

From (1) & (2) n=10,r=5

then term is

n

C

r

=10

C

5

pq=252pq

Step-by-step explanation:

252pq is your answer.......