# How do you write 5x^2 - 20x = 15 in standard form?

$5 {x}^{2} - 20 x - 15 = 0$
To transform this equation to the standard form subtract $\textcolor{red}{15}$ from each side of the equation:
$5 {x}^{2} - 20 x - \textcolor{red}{15} = 15 - \textcolor{red}{15}$
$5 {x}^{2} - 20 x - 15 = 0$