(p+3)5

HEPL!!!

2 answers

5p + 15
You must be studying the binomial expansion
I hope your teacher has made you aware of Pascal's Triangle.
Look at the row that starts with 1,5 ...
It should be 1 5 10 10 5 1

and (p+3)^5
= p^5 + 5(p^4)(3) + 10(p^3)(3^2) + 10(p^2)(3^3) + 5(p)(3^4) + 3^5
= p^5 + 15p^4 + 90p^3 + 270p^2 + 405p + 243

confirmation:
https://www.wolframalpha.com/input/?i=expand+%28p%2B3%29%5E5