315=(x^2)-x

Solution for 315=(x^2)-x equation:

315=(x^2)-x

We move all terms to the left:

315-((x^2)-x)=0

We get rid of parentheses

-x^2+x+315=0

We add all the numbers together, and all the variables

-1x^2+x+315=0

a = -1; b = 1; c = +315;
Δ = b2-4ac
Δ = 12-4·(-1)·315
Δ = 1261
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-\sqrt{1261}}{2*-1}=\frac{-1-\sqrt{1261}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+\sqrt{1261}}{2*-1}=\frac{-1+\sqrt{1261}}{-2}
$