Answers

2016-06-14T20:43:14+08:00
9a^2b^2.. because 3 times3 = 9 and a +a=a^2 and b+b=b^2
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2016-06-14T22:42:17+08:00
(3+a+b)(3+a+b)
=9+3a+3b+3a+a^2+ab+3b+ab+b^2
=a^2+b^2+2ab+6a+6b+9
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