How do you write the prime factorization of 28?

Answer 1

#2xx2xx7" " ->" "2^2xx7#

If you ever have any doubts you can always do a quick rough sketch of a factor tree. Mine is too neat for exam conditions.

Starting point: 28 is even so 2 will divide into it exactly.

It is helpful if you can commit some of the prime numbers to memory. A quick search on the internet will provide a list for you. I suggest you use 'images'

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Answer 2

Luna Angel

The prime factorization of 28 is #2^2 * 7#.

First, you can find any factor pair of 28. For example, the first one I think of is 74 (but 142 works as well). 7 is already prime, so that is already part of the prime factorization. Now, 4 isn't prime, so we must split that into a factor pair of some sort. In this case, we see automatically that #4 = 2^2#, and the 2's are prime. So the prime factoring ends there.

Putting everything together, we get #28 = 2^2 * 7#.

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Answer 3

Zoe Adams

The prime factorization of 28 is: 2 × 2 × 7

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.