Quadratic equations take the form: y = a x 2 + b x + c {\displaystyle y=ax^{2}+bx+c}
They can have zero, one, or two real solutions.
To solve any quadratic equation in the standard form, use: x = − b ± b 2 − 4 a c 2 a {\displaystyle x={\frac {-b\pm {\sqrt {b^{2}-4ac}}}{2a}}}
