Write A Shell Script To Find The Roots Of a Quardiatic Equation

Shell Script:

clear
echo general form ax2+bx+c=0
echo enter a
read a
echo enter b
read b
echo enter c
read c
d=`echo " scale=4;$b * $b - 4 * $a * $c " | bc`
if [ $d -lt 0 ]
then
echo roots are imaginary
else
echo roots are real
g=`echo " scale=4; -1 * $b + sqrt($d) " | bc`
h=`echo " scale=4; -1 * $b - sqrt($d) " | bc`
e=`echo " scale=4; 2 * $a " | bc`
f=`echo " scale=4; $g / $e " | bc`
y=`echo " scale=4; $h / $e " | bc`
echo the roots are $f and $y
fi



OUTPUT:

[admin@localhost ~]$ sh quard.sh
general form ax2+bx+c=0
enter a
1
enter b
-1
enter c
-12
roots are real
the roots are 4.0000 and -3.0000