I need help with pre-algebra problem. How do I factor this expression? 7 + 21p
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Originally Posted by makingthegrade I need help with pre-algebra problem. How do I factor this expression? 7 + 21p 7 is a common factor ....
Originally Posted by mr fantastic 7 is a common factor .... 7 + 21p = 7 + 3 * 7 *p =7(3p)+7 Would that be what they're looking for final answer?
You almost got it. You just need to pull the 7 out, like this: 7(3p+1)
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