Answer
Fill the blanks with
$1,\quad-4,\quad-1$
Work Step by Step
We need to rewrite the equation in the form
$ax^{2}+bx+c=0$,
so we add $-4x-1$ to both sides to obtain
$x^{2}-4x-1=0$
$a$ is the coefficient of $ x^{2}\qquad$ ... here $a=1$
$b$ is the coefficient of $ x\qquad$ ... here $a=-4$
$c$ is the constant$\qquad$ ... here $c=-1$
Fill the blanks with
$1,\quad-4,\quad-1$