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OpenStudy (anonymous):
Multiply. (a-3b)(a+3b). I know I'm doing something wrong but I keep coming up with a^2-9b^2. Or is this the right answer?
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jimthompson5910 (jim_thompson5910):
you are correct
jimthompson5910 (jim_thompson5910):
you're using the difference of squares rule
OpenStudy (anonymous):
ok. Thank you!
jimthompson5910 (jim_thompson5910):
yw
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