Multiply the following polynomials

1. 2a(a^2+4^a)

A. 2a^2+6a^2
B. 2a^3+8a^2
C. 2a+6a
D. 2a^3+6a^2

2. (3y)(3y-2)

A. 9y^2-6
B. 9y^2+5y
C. 9y^2+1
D. 9y^2-6y

Not sure? I'm not asking anyone to give me the answer but I don't know how to do this.

5 answers

I noticed in your first question you have 4^a.
None of the choices would match that.
It had to be 2a(a^2 + 4a) to get a correct answer from your choices.

You are using the distributive property which is illustrated by

a(b + c)
= ab + ac

you multiply the stuff sitting in front of the bracket by each term within the bracket

Let me know which are your choices.

For number 1 I'll go with b because it has to be one of them..on 2 I would go with D?

correct for both

Thanks Reiny for your help :)

You are very welcome