Factor the expression using the GCF. The expression 21m−49n factored using the GCF is...
2 answers:
Answer: 7(3m - 7n)
<u>Step-by-step explanation:</u>
Factor each term then see what value(s) they have in common:
21m - 49n
∧ ∧
3 · 7 · m 7 · 7 · n
Both terms have a 7 in common. What is left over after removing the 7?
21m: 7(3m)
49n: 7(7n)
GCF: 7 Leftovers: 3m <em>and</em> 7n
Factored form of expression is: 7(3m - 7n)
As 7 is a factor of both 21 and 49, you can take out 7 from both numbers.
7(3m-7n)
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