# Homework Help: Variation of Parameters herupu

1. Apr 30, 2012

### FHamster

1. The problem statement, all variables and given/known data
y'' + y' = 4t

2. Relevant equations

Use Variation of parameters!

3. The attempt at a solution

So I get homo of: c1 + c2 e^-(t)

From there I get a Wronskian of
-e^(-t)

Then I get variations 2t^2 and -4e^t(t-1)

Then get the answer of 2t^2 + 4t - 4

Btu its wrong :< uguu

2. Apr 30, 2012

### ehild

Check the signs.

ehild

3. Apr 30, 2012

### FHamster

derp

4. Apr 30, 2012

### HallsofIvy

derp?
herupu?
uguu?

What language is this?

5. Apr 30, 2012

### DryRun

LOL! :rofl: I couldn't resist clicking on the title.

FHamster, nobody is going to take your questions/problems seriously if you use weird words to accompany your academic ventures.

6. Apr 30, 2012

### ehild

You mean my answer was stupid? Thank you.

ehild

7. Apr 30, 2012

### FHamster

weaboonese

I mean I derped

8. Apr 30, 2012

### sid9221

LOL he said homo(I am such a child)

9. Apr 30, 2012

### DryRun

How did i miss that? :rofl:

10. Apr 30, 2012

### ehild

FHamster,

We use English here. I tried to help you, could you answer something in normal English?

ehild

11. Apr 30, 2012

### FHamster

It was very helpful. Thank you.