Question

expand (5a+2b)^3
chapter:polynomials​

Answer 1

Answer:

se the binomial expansion theorem to find each term. The binomial theorem states

(

a

+

b

)

n

=

n

∑

k

=

0

n

C

k

⋅

(

a

n

−

k

b

k

)

.

3

∑

k

=

0

3

!

(

3

−

k

)

!

k

!

⋅

(

5

a

)

3

−

k

⋅

(

2

b

)

k

Expand the summation.

3

!

(

3

−

0

)

!

0

!

⋅

(

5

a

)

3

−

0

⋅

(

2

b

)

0

+

3

!

(