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Right, you do the tree diagram thing.

So you start of with 84.

84

/ \

2 42

/ \

2 21

/ \

3 7

All of the numbers in bold are prime numbers, thus expressing 84 of its prime factors so the answer is: 2 x 2 x 3 x 7 or 2 (to the power of)2 x 3 x 7 :-)

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14y ago

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