Math Help - Integration problem

1. Integration problem

I'm blanking out on this one..

integral from -1 to 3 of..

sq.root(1 + (2x-5)^2)

Don't need you guys to do it, just give me a hint on how to go about it.. this is probably easy, I'm just blanking out

2. Originally Posted by coolguy99
I'm blanking out on this one..

integral from -1 to 3 of..

sq.root(1 + (2x-5)^2)

Don't need you guys to do it, just give me a hint on how to go about it.. this is probably easy, I'm just blanking out
let $2x-5=\tan(\theta) \implies 2dx=\sec^{2}(\theta)d\theta$

3. Originally Posted by coolguy99
I'm blanking out on this one..

integral from -1 to 3 of..

sq.root(1 + (2x-5)^2)

Don't need you guys to do it, just give me a hint on how to go about it.. this is probably easy, I'm just blanking out
Let $2x-5=\tan\theta$. It should be straightforward from there.

4. Originally Posted by coolguy99
I'm blanking out on this one..

integral from -1 to 3 of..

sq.root(1 + (2x-5)^2)

Don't need you guys to do it, just give me a hint on how to go about it.. this is probably easy, I'm just blanking out
$\int_{-1}^3\sqrt{1+(2x-5)^2}\,dx$

Substitute $2x-5=\tan\theta\Rightarrow dx=\frac12\sec^2\theta\,d\theta.$

Edit: Curses! I've been beaten!