Answer:
n²+8n+15
Explanation:
Given expression is (n+5)(n+3).
We have to expand it.
(n+5)(n+3)
Each of the two terms in first binomial is multiplied by the second binomial.
n(n+3)+5(n+3)
Each of the two terms in first binomial is multiplied by the each term of second binomial.
n(n)+n(3)+5(n)+5(3)
simplify
n²+3n+5n+15
add like terms
n²+n(3+5)+15
n²+n(8)+15
n²+8n+15 which is the answer.