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How do you write the sum of the number 63+15 as the product of their GCF and another sum?

1 Answer

Shwetank Mauria

Oct 18, 2016

$63 + 15 = 3 \times (21 + 5)$ $63+15=3xx(21+5)$

Explanation:

The prime factors of $63$ $63$ are $3 \times 3 \times 7$ $3xx3xx7$

and those of $15$ $15$ are $3 \times 5$ $3xx5$

As only $3$ $3$ is common, GCF is $3$ $3$

and as such $63 + 15$ $63+15$ can be written as

$63 + 15 = 3 \times 21 + 3 \times 5 = 3 \times (21 + 5)$ $63+15=3xx21+3xx5=3xx(21+5)$

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