I'm refreshing my math and a bit confused with the following expression and answer.

**Factoring:**
Solve:

Answer:

or

Answer:

Solve:

Answer:

or

Answer:

If I were to try and check the answer given

... I've learned I need to distribute the problem to obtain the answer. In this case

, which would give me a totally different answer of

, that is not an answer or how could one even derive

.

If I were to check the answer with my solution

...

... I would then get

I'm lost...

Edit:

Going to basic math... mutliply/divide, add, subtract... anything in parenthesis is always solved first... so how can one justify using parenthesis in the first set of numbers in this answer!? "()" doesn't mean quantity... or does it...