Question

What is 2a squared if a=3?

Answer 1

If You mean is :

`2a^(2)~~~~~~[just\ subtituted\ a\ into\ 3]`


`2a^(2)\\=2(3)^(2)\\=2(3 * 3)\\=2(9)\\=18`

Answer 2

2(3)^2= 18 that is with a(3) squared or 2(3)=6 and 6squared or 6^2 = 36.