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| Math Central | Quandaries & Queries |
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Question from chaleen, a student: 1. multiply = 3a - 3b by a+b |
Chaleen,
When you see 3a - 3b you should immediately take out the common factor of 3 and get
3a - 3b = 3(a - b)
The question is then to multiply 3(a - b) by (a + b). So I would multiply
(a - b)(a + b)
and then multiply the result by 3.
Penny
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