Factor

Sir CPhill has a pet rock. It’s actually a bolder that he often chases up and down a hill.

Is the last number supposed to be positive?

The answer is (2k+1)(4k-5) I think.

No, its negative. That whats written in my textbook. 

Is (2k+1)(4k-5) right though?

Yes (2k+1)(4k-5) is right.

The second Guest's answer is correct....

Yes its right! Thank you :)

Hi Chris. Out of curiosity, do you have any pets?

um... @MysticalJaycat who is chris?

To be technically correct, GA.......I chase the boulder up the hill.......but......it usually chases me back down!!!.....however......most of the time......I farm this duty out to  Sisyphus......so......my "pet rock" is really more his "pet rock"

Uh.....wait just a sec....I think I see him now.....

You know, I am often amazed how many pets seem to like the friendly neighbor more than they do their master or mistress. 

For over twelve years, I’ve volunteered at a pet shelter, and we’ve had about every kind of pet you might think of: Along with dogs, cat and birds, there have been many reptiles (including an alligator), snakes (including the poisonous kind) and even monkeys (never a chimp, but one works there, though), but one thing we’ve never had was a pet rock. I should bring one in.