Question 766327
Using solution to quadratic formula is the long way to the answer because you already have the equation in standard form.  Just solve directly.


{{{(5x+1)^2=-13}}}
{{{5x+1=(+-sqrt(-13))}}}
{{{5x=(-1+-sqrt(-13))}}}
{{{highlight(x=(-1+-sqrt(-13))/5)}}}


While your steps are a little difficult to follow, you seemed to simply not simplify at the end; otherwise, good.