A quadratic equation is an algebraic equation of the second degree.
A quadratic equation is of the form:
[tex]y=ax^2+bx+c[/tex]This can also be written as:
[tex]y=c+bx+ax^2[/tex]Comparing the equation above with each of the options, the equation that represents a quadratic function is:
[tex]y=6+5x+x^2[/tex]The graph of the equation y = 6 + 5x + x^2 is plotted below
