Step-by-step explanation: This trinomial is in a special form
that can be factored into the product of two binomials.
So setup 2 sets of parenthses.
The first term in each set is a factor of n²
and since n factors as n times n, we use an n.
For the second term, use factors of the last term that
add to the coefficient of the middle term.
The factors of 63 that add to 16 are 9 and 7.
So we have (n + 9)(n + 7) which is our answer.
