He would have 15. There are only 15 puzzles so you would use them until there gone although there would still be CDs they wouldn't have anyone else to pair with.
ANSWER
Brayden should have expanded the parenthesis first.
EXPLANATION
The expression Brayden is trying to simplify is
To simplify this expression, the first thing to do is to expand the perfect square to obtain:
We can now distribute the negative to the terms in the parenthesis.
Answer:
The answer is the first one.
Answer:
quadratic formula
Step-by-step explanation:
this applies when you look for the x values of a quadratic equation