Quadratic equation

What is a quadratic  equation?

A quadratic equation  is a polynomial expression of the additional degree.

The accepted form is

ax^2+bx+c=0,

where x represents a variable and a, b and c are constants with a ≠ 0. 

Examples of quadratic equations:

(a)5x2 − 3x − 1 = 0 is a quadratic equation in quadratic form where

a = 5, b = -3, c = -1

(b) 5 + 3t − 4.9t2 = 0 is a quadratic equation  in quadratic form.

Here, a = -4.9, b = 3, c = 5 

Quadratic functions:

A quadratic function  is a polynomial function of the form

f(x)=ax^2+bx+c, where a is not equal to 0

The graph of a quadratic function  is a parabola whose major axis is parallel to the y-axis .

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