# How do you multiply (4a-1/2)^2?

${\left(4 a - \frac{1}{2}\right)}^{2} = \left(4 a - \frac{1}{2}\right) \left(4 a - \frac{1}{2}\right)$
$16 {a}^{2} - \frac{4}{2} a - \frac{4}{2} a + \frac{1}{4}$
$16 {a}^{2} - 4 a + \frac{1}{4}$