Code covered by the BSD License

### Highlights from Quadratic Equation Calculator

1.5
1.5 | 2 ratings Rate this file 25 Downloads (last 30 days) File Size: 9.42 KB File ID: #22935 Version: 1.1

### Diego Barragán (view profile)

09 Feb 2009 (Updated )

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Description

Enter the coefficients for the Ax2 + Bx + C = 0 equation and Quadratic Equation will output the solutions and plot(if they are not imaginary).

MATLAB release MATLAB 7.7 (R2008b)
11 Feb 2009 Guillermo Quintas

### Guillermo Quintas (view profile)

10 Feb 2009 Husam Aldahiyat

### Husam Aldahiyat (view profile)

While you do that why not add more features, like roots of a function regardless of its order or something else. You can use the MATLAB function roots which will help immensly.

Currently, even if you fix these mistakes, it's still very bare bones and needs more features.

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10 Feb 2009 Diego Barragán

### Diego Barragán (view profile)

Hi Husam and Matt Fig, thanks a lot for review my program "Quadratic Equation Calculator". I will change it.

Regards, Diego.

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10 Feb 2009 Matt Fig

### Matt Fig (view profile)

I gave two stars because by running this program, the root is changed then not changed back. That is not a good way to make users of your code happy. When the user closes the GUI, you need to set colordef back to what it was prior to initialization. I will change my rating when this is fixed.

10 Feb 2009 Matt Fig

### Matt Fig (view profile)

In the lines where you calculate the quadratic formula, you need a parenthesis around the 2*a, like this;
x1=(-b+sqrt(b^2-4*a*c))/(2*a)
x2=(-b-sqrt(b^2-4*a*c))/(2*a)
Otherwise your solutions are only valid for a = 1.

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09 Feb 2009 Husam Aldahiyat

### Husam Aldahiyat (view profile)

Enter [3 5 2] as values for [A B C] and you'll get messed up results. Same for [2 5 2].

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