\(n^{2}+16 n+63\)

Explanation

When multiplying binomials use the FOIL method which has you multiply the First two terms in each binomial:

\( n \times n = {n^2}\)

Then multiply the Outside two terms in each binomial:

\(n \times 9=9 n\)

Then multiply the Inside two terms in each binomial:

\(7 \times n=7 n\)

Then multiply the Last two terms in each binomial:

\(7 \times 9=63\)

Then add all of those terms together to get the answer:

\( {n^2} + 9n + 7n + 63 = {n^2} + 16n + 63\)

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