Carol Valentine

2021-12-29

What are the prime factors of 45?

stomachdm

Expert

Explanation:
If I know a quick math fact, I like to start with that when working with prime factors:
$45=9×5$
5 is prime but 9 is not:
$45=3×3×5$
3 and 5 are both prime and so we're done

Bob Huerta

Expert

Explanation:
Prime numbers from 0 - 10 are: 2,3,5,7.
Lets divide 45 in the short division method using prime numbers only.
$\frac{45}{5}⇒\frac{9}{3}⇒\frac{3}{3}⇒1$
therefore factors of 45 are:
$5\cdot 3\cdot 3$

Vasquez

Expert

prime factorisation? As in prime factors of a number?
$45=9×5$
$⇒3×3×5$

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