MHB Can Algebra Alone Rearrange This Differential Equation?

  • Thread starter Thread starter whiskybrah
  • Start date Start date
whiskybrah
Messages
1
Reaction score
0
I'm completely new to differential equations. I'm just doing random problems online about them. One simple problem asks to re-arrange the following so that the x's and y's are all on one side:

$$x^2 + dy/dx + xy = 1$$

Can I just use algebra to do it? Like:

$$ dy/dx = x^2/xy $$
 
Physics news on Phys.org
whiskybrah said:
I'm completely new to differential equations. I'm just doing random problems online about them. One simple problem asks to re-arrange the following so that the x's and y's are all on one side:

$$x^2 + dy/dx + xy = 1$$

Can I just use algebra to do it? Like:

$$ dy/dx = x^2/xy $$

Welcome to MHB!

Yes but maybe revisit algebra first. There are several mistakes here and it isn't clear what you've done. Mind expanding? :)
 
Thread 'Direction Fields and Isoclines'
I sketched the isoclines for $$ m=-1,0,1,2 $$. Since both $$ \frac{dy}{dx} $$ and $$ D_{y} \frac{dy}{dx} $$ are continuous on the square region R defined by $$ -4\leq x \leq 4, -4 \leq y \leq 4 $$ the existence and uniqueness theorem guarantees that if we pick a point in the interior that lies on an isocline there will be a unique differentiable function (solution) passing through that point. I understand that a solution exists but I unsure how to actually sketch it. For example, consider a...
Back
Top