# What is the standard form of the equation of a circle with r=4; C(3,-4)?

Dec 3, 2015

${\left(x - h\right)}^{2} + {\left(y - k\right)}^{2} = {r}^{2}$
For this problem, $r = 4 , h = 3 , k = - 4$
${\left(x - 3\right)}^{2} + {\left(y + 4\right)}^{2} = {4}^{2} = 16$