How Do I Integrate (x^2 + 7x + 10) / (x + 2)?

[Guero]

how can i integrate:
x^2+7x+10 dx
x+2

i assume it's by substitution, but i can't work it out.

sorry for the formatting, btw

 

[whozum]

Factor the top, it cancels.

 

[minase]

how can i integrate:
x^2+7x+10 dx
x+2

i assume it's by substitution, but i can't work it out.

sorry for the formatting, btw

(x+5)(X+2) =x+5
(x+2)
I don't know nothing about integrate. But I think you have to factor the trinomial then divide.

 

[whozum]

Note the singularity at x = -2, it can't be integrated in a region containing this point.

 

[dextercioby]

Not really.It can't be defined at x=-2,which means that automatically that point is excluded from the integration domain.

Daniel.

 

[Guero]

thanks. should've seen it.

 

[whozum]

Does the integral

\int_{-3}^1 \frac{x^2+7x+10}{x+2} \ dx exist, dex? As its written?

 

[dextercioby]

I don't know.U'll have to break it into 2 and evaluate each limit.(I wasn't talking about a definite integral,so your (counter)example is useless).

Daniel.

 

[whozum]

Note the singularity at x = -2, it can't be integrated in a region containing this point.

Not really.It can't be defined at x=-2,which means that automatically that point is excluded from the integration domain.

Its the same thing.

 

[HallsofIvy]

However, the integral is a "smoothing" operation. The integral of a function with removable discontinuity exists and is exactly the same as the integral of the function with the discontinuity removed.

 

[what]

whozum do you agree that x^2 is integratable, what about \frac{(x^2)(x+1)}{x+1}?

 

[whozum]

Theyre both integrable, just the latter isn't continuous.