Marks$]$ Write a function quadratic which has three parameters: $a,b$ and $c.$ These are values in the standard quadratic equation:

$a{x}^2+bx+c=0$

e function will return a string containing the value for $x$ as follows:

det$=b^2-4ac$

When det is equal to zero, $x$ is calculated as follows:

$x=-\frac{b}{2a}$

return a string containing this value to $2$ decimal places. Example:

$x=4\mathrm{.}56$

When det is greater than zero, $x$ is calculated as:

$x1=\frac{-b+\sqrt[\phantom{2}]{\text{d}\text{e}\text{t}}}{2a}$

$x2=\frac{-b-\sqrt[\phantom{2}]{\text{d}\text{e}\text{t}}}{2a}$

return a string containing these values to $2$ decimal places. Example:

$x=3\mathrm{.}57$ and $-4\mathrm{.}56$

When det is less than zero, $x$ is calculated as:

$x$ Real $=-\frac{b}{2a}$

$x$ Imaginary $=\frac{\sqrt[\phantom{2}]{-\text{d}\text{e}\text{t}}}{2a}$

return a string containing these values to $2$ decimal places. Example:

$x=3\mathrm{.}56-2\mathrm{.}34$i and $3\mathrm{.}56+2\mathrm{.}34i$