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alli4476

Hey you guys I REALLY NEED HELP

  • one year ago
  • one year ago

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  1. alli4476
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    what is the lcm of -14a^3b^7 and 21a^5b^2

    • one year ago
  2. alli4476
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    isit 7a^8b^9

    • one year ago
  3. jim_thompson5910
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    what's the LCM of 14 and 21

    • one year ago
  4. alli4476
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    42

    • one year ago
  5. JuanitaM
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    for the coefficent - LCM multiply the coefficient - what is the smallest number that both 14 and 21 divide evenly. So look at x^3 and x^5; Do you see that x^5 is the smallest monomial that both x^3 and x^5 divide evenly? ----- And looking at b^7 and b^2; Do you see that b^7 is the smallest?

    • one year ago
  6. jim_thompson5910
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    now find the LCM of a^3 and a^5

    • one year ago
  7. alli4476
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    wait do I divide 3 and 5

    • one year ago
  8. jim_thompson5910
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    you just take the larger exponent so the LCM is a^5

    • one year ago
  9. jim_thompson5910
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    the LCM of b^2 and b^7 is b^7

    • one year ago
  10. jim_thompson5910
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    all together: LCM of -14a^3b^7 and 21a^5b^2 is 42a^5b^7

    • one year ago
  11. alli4476
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    are you sure there is not that answer

    • one year ago
  12. jim_thompson5910
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    what answer choices do you have

    • one year ago
  13. alli4476
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    here is what I have 7a^8b^9 249a^8b^9 249a^3b^2 7a^3b^2

    • one year ago
  14. jim_thompson5910
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    looks like you want the GCF (and not the LCM) then

    • one year ago
  15. jim_thompson5910
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    I see the GCF in there, but not the LCM

    • one year ago
  16. JuanitaM
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    agreed with Jim :)

    • one year ago
  17. alli4476
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    oh yeah sorry guys

    • one year ago
  18. JuanitaM
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    your answer for the 7 is correct, but for GCF and exponents; you take the smaller of the exponents

    • one year ago
  19. alli4476
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    ok

    • one year ago
  20. alli4476
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    so it would be 7a^3b^2

    • one year ago
  21. alli4476
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    right

    • one year ago
  22. jim_thompson5910
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    you are correct

    • one year ago
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