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anonymous

  • one year ago

Can someone explain how to factor this problem? 8x5 − 36x2

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  1. Vocaloid
    • one year ago
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    start by finding the Greatest common factor of 8 and 36

  2. anonymous
    • one year ago
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    How can i ?

  3. Vocaloid
    • one year ago
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    well, can you list the factors of 8?

  4. anonymous
    • one year ago
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    28

  5. Vocaloid
    • one year ago
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    uh, not quite... the factors of 8 are: 1,2,4, and 8 and the factors of 36 are: 1,2,4,9,12, 18, and 36 so our GCF is 4, since this is the highest number they both have in common with me so far?

  6. anonymous
    • one year ago
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    i Div 8 by 36 and i got 28. How did you get 4

  7. Vocaloid
    • one year ago
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    uh, I'm not quite sure how you got 28... do you know what a factor is?

  8. anonymous
    • one year ago
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    no

  9. anonymous
    • one year ago
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    ok so you want me to do 8 Div 36

  10. Vocaloid
    • one year ago
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    uh, well, it would be good to learn what a factor is before attempting these problems http://www.math.com/school/subject1/lessons/S1U3L1GL.html

  11. anonymous
    • one year ago
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    How did you get 4

  12. anonymous
    • one year ago
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    Thats what i don't understand ?

  13. Vocaloid
    • one year ago
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    I don't mean "divide 8 by 36" , I meant to find the biggest number that goes into 8 and 36

  14. anonymous
    • one year ago
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    Ok how can i know, the biggest number that goes by the two numbers.

  15. Vocaloid
    • one year ago
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    start by listing the factors of 8 and 36

  16. anonymous
    • one year ago
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    1248

  17. anonymous
    • one year ago
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    Ok i get it now

  18. anonymous
    • one year ago
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    so it would be 4x

  19. Vocaloid
    • one year ago
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    just 4, not 4x, we'll get to the x in a minute now, we factor out 4 giving us: 8x5 − 36x2 = 4(2x^5-9x^2)

  20. Vocaloid
    • one year ago
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    now, the GCF of x^5 and x^2 is x^2, so we factor that out, giving us: 4x^2(2x^3-9) which is our answer

  21. anonymous
    • one year ago
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    How you get 2

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