So let's say I have an equation of the form ax squared plus bx plus c is equal to 0. ... Now, given that you have a general quadratic equation like this, the quadratic formula tells us that the solutions to this equation are x is equal to negative b plus or minus the square root of b squared minus 4ac, all of that over 2a.
vertex. The point at which a parabola changes direction, corresponding to the minimum or maximum value of the quadratic function axis of symmetry. A vertical line drawn through the vertex of a parabola around which the parabola is symmetric.