The ________ ________ of a complex number $z = a + bi$ is given by $z = r(\cos\ \theta + i \sin\ \theta)$, where $r$ is the ________of $z$ and $\theta$ is the ________ of $z$.
The complex number $u = a + bi$ is an ________ ________ of the complex number $z$ if $z = u^{n} = (a + bi)^{n}$.
In Exercises 5-10, plot the complex number and find its absolute value.
$5 - 12i$
$-7$
$-8 + 3i$
In Exercises 15-32, represent the complex number graphically, and find the trigonometric form of the number.
$5 - 5i$