create factor trees. write the prime factorization for each number in compact form using exponents. 18

Question

zepdrix · Answer

Hi c:

zepdrix · Answer

|dw:1409014296941:dw|What are some factors of 18?
Do you know? :o

anonymous · Answer

hi... no I don't know what the factors of 18 are?

zepdrix · Answer

Hmm it's an even number, which means it must be divisible by 2.
So if you're ever really having trouble coming up with factors,
always try to cut it in half (factor out a 2).

18 = 2 x something.

zepdrix · Answer

What's the other factor?
2 times what?

anonymous · Answer

2 or 4?

zepdrix · Answer

2 x 2 = 4
2 x 4 = 8

Hmm, no those don't seem to get us to 18 :(

anonymous · Answer

oooh okay I got you... 2times9 equals 18??

zepdrix · Answer

|dw:1409016001229:dw|Ok good.
But 9 is not a prime number, so we need to go a little further.
Can you think of factors of 9?
Two numbers that multiply to give us 9, hmm..