Don't forget that you can use fprintf $(\text{'}$Enter Text Here $\frac{?}{?}$

$\text{'})$ and it will display that

message in the command window. Recall the quadratic formula is

$\frac{-b+-\sqrt[\phantom{2}]{b^2-4ac}}{2a}$

Run this program in the Command Window three times to obtain solutions to the following

three equations:

$($a$)2x^2+8x+8$

$($b$)-5x^2+3x-4$

$($c$)-2x^2+7x+4$

Example for part $($a$)$:

This program finds the roots of the quadratic equation $y=a{x}^{{?}^{{?}^{?}}}2+bx+c.$

What are $a,b,$ and $c?$ Please enter in $[$a b c$]$ format: $\left[\begin{array}{ccc}2& 8& 8\end{array}\right]$

The equation has one real root.

$x1=$

$-2$

Solution: Other answers: $($b$)$ two complex roots, $0\mathrm{.}3+0\mathrm{.}8426$i and $0\mathrm{.}3-0\mathrm{.}8426i($c$)$ two

real roots, $4$ and $-0\mathrm{.}5$