Help with integral w.r.t. x of x^2 - 1, from x = 1 to x = 3

[scoutboy]

Hey everyone. I decided I wanna learn some math in my spare time since I was never really good at it. Right now I'm looking at integrals and I am faced with a problem that I don't know how to solve...

. . .\(\displaystyle 12\, \displaystyle{ \int_1^3\, \left(x^2\, -\, 1 \right)\, dx }\)

so if anyone could help me out that would be awesome.

 

[stapel]

\(\displaystyle 12\, \displaystyle{ \int_1^3\, \left(x^2\, -\, 1 \right)\, dx }\)

Have you studied derivatives yet? If so, have you studied anti-derivatives yet? If so, what have you learned about integrating polynomial terms?

Please be complete. Thank you!