SOLUTION: How would I simplify this problem? (a-b)(a+b)= i keep coming up with different answers that don't reflect what's in the book. thanks

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Question 21256: How would I simplify this problem?
(a-b)(a+b)=
i keep coming up with different answers that don't reflect
what's in the book. thanks
Answer by GuessWho(10) About Me  (Show Source):
You can put this solution on YOUR website!
I'm not sure, so i dont want to jump to conclusions, but i think the answer would be -ab. since both exponets have doubles, you combine them, and change it from positive to negative. if i'm wrong, i'm sorry. I just woke up.