# How to make Mathematica to recognize my variables?

Posted 10 years ago
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 Hi, im new using Mathematica 9, and its quite useful for me because it helps me to study diferential ecuations, but im having a problem, i dont get my ecuations solved i dont know why, despite im sure im writing them right. I will add a picture As you can see, the variable X doesn't get that light blue color that means that is a variable, and i dont know what to do.Thank you for any information you can give me, please, excuse me if i made grammar mistakes or something, english is not my own language. Greetings.
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Posted 10 years ago
Posted 10 years ago
 Great! it's done!Thank you a lot!
Posted 10 years ago
 Please copy an example equation which shows this problem from your notebook to your computer's clipboard,create a reply to this message,click on the   <>    near the right end of the second line above the reply box to enable pasting Mathematica codeand paste your expression into the reply box.Then post that and verify that it is displayed as in your notebook, edit if needed until it is correct,the color hilighting may not be the same, but verify that all else is the same.Make certain that the example is simple, but includes all information needed for someone else to understand it.Then someone else can reverse this and put your code in their own notebook and try to determine why this is happening.
Posted 10 years ago
 Dsolve[y'[x] == (x^2)*y[x], y[x], x]Dsolve[y'[x] == 2 x + 5, y[x], x]These are examples of what im writing in Mathematica, but nothing happens when i press Intro, the only thing that happens is that the ecuation appears re-writed in this way, for example.Dsolve[Derivative[1][y] == x^2 y[x], y[x], x]Dsolve[Derivative[1][y] == 5 + 2 x, y[x], x]
Posted 10 years ago
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