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How do you write the prime factorization of 87?

1 Answer

Nov 26, 2016

$87= color(green)(3xx29)$

Explanation:

$89$ is not divisible by $2$ , so we need to try the next prime: $3$

$89div3 = 29$

$29$ is not divisible by $3$ , so we need to try the next prime: $5$

$29$ is not divisible by $5$ , so we need to try the next prime: $7$

...but $7^2$ is greater than $29$ , so no other factors are possible.

The only prime factors of $89$ are $3$ and $29$

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