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5 votes
9 + 21 factor the expression using gcf

2 Answers

1 vote
Both number are divisible by 3, so divide each by 3

3(3+7)
User Dfranca
by
7.5k points
5 votes
factors of 9:

1, 9, 3

factors of 21:

1, 21, 3, 7

3 is greatest Common factor.

Divide both numbers by three and put three outside the bracket


3(3+7)

User IgorZ
by
7.7k points

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