Answer
$n = 13, 15$
Work Step by Step
1. Use the distributive property:
$n(n-28) = -195$
$n^{2}-28n=-195$
2. Set the equation equal to zero:
$n^{2} - 28n + 195 = 0$
3. Find two numbers that can be multiplied together to obtain $195$ and can be added together to obtain $-28$:
$-13$ and $-15$
$(n-13)(n-15) = 0$
$n - 13 = 0$
$n = 13$
$n - 15 = 0$
$n = 15$
$n = 13, 15$
