Quadratic equations take the form: y=ax2+bx+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±b2−4ac2a{\displaystyle x={\frac {-b\pm {\sqrt {b^{2}-4ac}}}{2a}}}