What are the quadratic equation and quadratic function?

Also, what is quadratic function formula?

A quadratic function is one of the form f(x) = ax² + bx + c, where a, b, and c are numbers with a not equal to zero. The graph of a quadratic function is a curve called a parabola.

Beside above, what are the 3 forms of quadratic functions? While most of the ways to write the quadratic equation are redundant and useless, there are three forms that actually have unique uses. These three main forms that we graph parabolas from are called standard form, intercept form and vertex form.

Then, what is the quadratic formula and what is it used for?

As well as being a formula that yields the zeros of any parabola, the quadratic formula can also be used to identify the axis of symmetry of the parabola, and the number of real zeros the quadratic equation contains.

What is the vertex formula?

y = a(x – h)² + k, where (h, k) is the vertex. in y = ax² + bx + c (that is, both a's have exactly the same value). The sign on "a" tells you whether the quadratic opens up or opens down.