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EmmaH

Write the prime factorization, using 'x' between the numbers: 102 i dont understand whta it is asking and how to figure it out

  • one year ago
  • one year ago

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  1. whpalmer4
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    Do you know what a prime number is? A prime number is a number such as 2, 3, 5, 7 (but not 9!), 11, 13 which can't be evenly divided by any numbers except 1 and itself. A prime factorization is just figuring out which numbers need to be multiplied together to make the number you are factoring. For example, a prime factorization of 4 would be 2x2. 12 would be 2x2x3. Start by dividing by 2 as many times as you can, then try 3, 5, 7, 11, 13 up until you reach the point where the number you are about to try times itself > the number you are factoring. If I'm factoring 51, it isn't divisible by 2, so I try 3. 51/3 is 17. Now, 17 isn't divisible by 3, so I think about trying 5, but before I do, I check the value of 5*5, which equals 25. 25 > 17, so I don't need to go any further. The prime factorization of 51 is 3x17. Try it! If you get stuck, post what you've done and we'll have a look.

    • one year ago
  2. EmmaH
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    so find the factors of 102?

    • one year ago
  3. EmmaH
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    2,5,17,3

    • one year ago
  4. EmmaH
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    @whpalmer4 ?

    • one year ago
  5. AriPotta
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    factor treeeee

    • one year ago
  6. AriPotta
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    |dw:1359231211743:dw|

    • one year ago
  7. AriPotta
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    |dw:1359231316448:dw|

    • one year ago
  8. AriPotta
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    |dw:1359231333519:dw|

    • one year ago
  9. AriPotta
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    does that make sense?

    • one year ago
  10. EmmaH
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    wait ust 2.3.7?

    • one year ago
  11. AriPotta
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    yea. 2, 3, and 17 are the prime factors

    • one year ago
  12. EmmaH
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    but the prob saysd "; using 'x' between the numbers"

    • one year ago
  13. AriPotta
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    that's what i did. 2x3x17

    • one year ago
  14. EmmaH
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    oooh thanks

    • one year ago
  15. AriPotta
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    no problemo :)

    • one year ago
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