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The prime factor decomposition of 84 is: 2 x 2 x 3 x 7

If you want to see my working (in case I made a mistake):

84/2=42 (42 is not prime),

42/2=21 (21 is not prime),

21/3=7 (7 is prime, so stop here)

factors: 2,2,3 and 7

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15y ago

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