simple Perl programs

I am learning the basics of Perl and would like to have some extremely simple beginning programs to do minor computations such as quadratic formula, and possibly something for an easy text-based user interface.  I am in a hurry for this.  Thanks.
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die "linear" if $a == 0;
$m = $b**2 - 4*$a*$c;
if( $m >= 0 ){
  @roots=((-$b + sqrt($m))/(2*$a),(-$b - sqrt($m))/(2*$a));
  print "real roots of $a*x²+$b*x+$c=0: @roots\n";
  use Math::Complex;
  print "complex roots of $a*x²+$b*x+$c=0: @roots\n";

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neymeyerAuthor Commented:
Thank you
#@roots=map{($b+$_)/(2*$a)}root($m,2); #should have been
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