Hello Everyone,

I have a very embarrassing question. I'm studying the introduction chapter in my Calculus book.

I have the following problem:

The answer in my book:

My answer doesn't match and I can't really figure out why:

Split points: -2, 1, 3

There must be four intervals to test

So I use the following test points to determine when the inequality is greater than 0: -3, 0, 2, 4

x= -3 [-] Doesn't Work

x = 0 [+] Does Work

x = 2 [-] Doesn't Work

x = 4 [+] Does Work

So according to me and this work I did the solution should be