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#### find_the_fun

##### Active member

- Feb 1, 2012

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I was stuck on a question and went back to look at an example but couldnt understand the example. It has \(\displaystyle (y-x)dx +4xy dy = 0\) is linear in y because it can be written as \(\displaystyle 4xy'+y=x\)

First of all what are dx and dy doing in the equation? They look to be from the end of an integral. Second, how did the equatin get rewritten like that?

First of all what are dx and dy doing in the equation? They look to be from the end of an integral. Second, how did the equatin get rewritten like that?

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