Questions about quadratic functions and equations, second degree polynomials usually in the forms $y=ax^2+bx+c$, $y=a(x-b)^2+c$ or $y=a(x+b)(x+c)$.
Questions about quadratic functions and equations, second degree polynomials usually in the forms $$y=ax^2+bx+c$$, $$y=a(x-b)^2+c$$ or $$y=a(x+b)(x+c)$$.
The root of $$y=ax^2+bx+c$$ can be solved by the formula $$x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}$$