A quadratic equation is any equation that can be put into the following general form:
The requirement is that $a \ne 0$. $a$, $b$ and $c$ are coefficients.
To bring a quadratic equation into canonical form, the whole equation is divided by the coefficient $a$ (the number that precedes $x^2$).
Put the equation $2x^2+8x+7=0$ in the canonical form.$2x^2+8x+7=0$ $|:2$