Suppose you want to solve the equation x^2-5*x=6. The solve command takes as its input a symbolic expression, not an equation and assumes that the expression is equal to 0. If MATLAB doesn't recognize the quadl command, make sure that you have typed it correctly. MATLAB (and most mathematical software) knows the natural logarithm as log(x). MATLAB (and most mathematical software) knows the exponential function as exp(x) so the number e in MATLAB is exp(1). The exponential function and the number e If you have a space or hyphen, when you publish to html MATLAB will give an error message when it tries to execute the first command and won't try to execute any later commands.
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