(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Uxx +u(x,y)=0

2. Relevant equations

?

3. The attempt at a solution

Step 1) u(x,y)=A(x)B(y)

Step 2) uxx=d^u/dx^2

Step 3) d^u/dx^2 + A(x)B(y) = 0

Step 4) d^u/dx^2 = -[A(x)B(y)] (?)

I have no idea what I'm doing, so small words would be useful.

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# 2nd order differential equations I'm so screwed

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