# Math Help - MATLAB - plotting a quadratic

1. ## MATLAB - plotting a quadratic

Quick question:
How do I plot the following in MATLAB:
$3x^2 - 4xy + 3y^2 = 20$
cheers

edit:
nevermind, think I've go it now:
appears to work.

2. Originally Posted by Dr Zoidburg
Quick question:
How do I plot the following in MATLAB:
$3x^2 - 4xy + 3y^2 = 20$
cheers

edit:
nevermind, think I've go it now: