# Is y = x^2 – 4x + 7  a quadratic function?

Jul 7, 2015

Yes

#### Explanation:

Any equation in the form or which can be re-arranged into the form:
$\textcolor{w h i t e}{\text{XXXX}}$$y = a {x}^{2} + b x + c$ with constants $a , b , c$
is a quadratic function (basically by definition).