Question

Hence write the expansion of x*3 + (2y)*3( Refer figure)​

Answer 1

Answer:

Use the formula T

r+1

=(−1)

r

n

C

r

x

n−r

a

r

For (r+1)th term and putting n=7 ,

we get 7−r=3 for power 3 term of x.

Hence, r=4 and r+1=5

So, it's 5th term.

Answer 2

Answer:

x³+ (2y)³ = 8(xy³)

Step-by-step explanation:

X³ + (2y)³ =

x³ + 2³ × y³

X³ + 8y³

8 (xy)³