ChristaB
Multiplying Polynomials using the FOIL process. Can anyone help me?
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ChristaB
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\[(X + 4) ^{3}\] ---- I am lost on the step by step (showing my work) -
saifoo.khan
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|dw:1352972916740:dw|
ChristaB
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Its cubed
saifoo.khan
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Oh, okay. Then write it this way:|dw:1352973007354:dw|
ChristaB
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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
saifoo.khan
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Next:
|dw:1352973075697:dw|
ChristaB
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\[X ^{2} + X ^{4}+4(X) + 4 (4) + (X + 4)\]
saifoo.khan
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Noe.
dpaInc
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nice save @saif! :)
saifoo.khan
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Next will be:|dw:1352973489598:dw|
ChristaB
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No wait... \[X ^{2 + X (4) + 4(X) 4 (4) + (X + 4)}\]
emilie.li
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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)
ChristaB
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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
saifoo.khan
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The working we showed isn't the final step. :P
emilie.li
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|dw:1352973951215:dw|
emilie.li
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that should give you the answer in the book
ChristaB
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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??