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ChristaB

  • 3 years ago

Multiplying Polynomials using the FOIL process. Can anyone help me?

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  1. ChristaB
    • 3 years ago
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    \[(X + 4) ^{3}\] ---- I am lost on the step by step (showing my work) -

  2. saifoo.khan
    • 3 years ago
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    |dw:1352972916740:dw|

  3. ChristaB
    • 3 years ago
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    Its cubed

  4. saifoo.khan
    • 3 years ago
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    Oh, okay. Then write it this way:|dw:1352973007354:dw|

  5. ChristaB
    • 3 years ago
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    I wrote out step one as: \[( X +4) ^{2} (x +4)\] --- But then I loose it and have no idea what to do after that

  6. saifoo.khan
    • 3 years ago
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    Next: |dw:1352973075697:dw|

  7. ChristaB
    • 3 years ago
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    \[X ^{2} + X ^{4}+4(X) + 4 (4) + (X + 4)\]

  8. saifoo.khan
    • 3 years ago
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    Noe.

  9. dpaInc
    • 3 years ago
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    nice save @saif! :)

  10. saifoo.khan
    • 3 years ago
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    Next will be:|dw:1352973489598:dw|

  11. ChristaB
    • 3 years ago
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    No wait... \[X ^{2 + X (4) + 4(X) 4 (4) + (X + 4)}\]

  12. emilie.li
    • 3 years ago
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    may not be right, but here's a shot: (x+4)(x+4)=X ^{2}+8x+16 then multiply that by (x+4)

  13. ChristaB
    • 3 years ago
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    The book gives the answer as: \[X ^{3 }+ 12X ^{2}+ 48X + 64 ---- AS you can see... I have no idea how to get from my last post to this answer...Im lost

  14. saifoo.khan
    • 3 years ago
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    The working we showed isn't the final step. :P

  15. emilie.li
    • 3 years ago
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    |dw:1352973951215:dw|

  16. emilie.li
    • 3 years ago
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    that should give you the answer in the book

  17. ChristaB
    • 3 years ago
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    Got it... thank you. Of the 108 problems in this chapter, I have one other that I am struggling with... If your up for the assistance, I will close this one out and post the other problem??

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