Help with DD's algebra homework, PLEASE!!! - Mothering Forums

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#1 of 4 Old 12-02-2010, 09:13 PM - Thread Starter
 
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She's factoring polynomials.

 

when we did X to the 4th - 9 we got (X squared + 3)(x squared + 3)

 

Here's the one we're stuck on....

-16 + a to the 12th

 

PLEASE HELP!!!


Heather married to my highschool sweetheart 6/7/02 :cop: Mother to Dani age 14 and Timmy age 10 Nadia 1/29 :
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#2 of 4 Old 12-02-2010, 09:26 PM
 
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(a^6+4)(a^6-4)

 

and if you keep going

 

(a^3-2)(a^3+2)(a^6+4)

 

For the examples you're giving, where you're factoring a^b-c and b is even, your answer is (a^(b/2)+sqrt(c))(a^(b/2)-sqrt(c))

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#3 of 4 Old 12-02-2010, 09:38 PM - Thread Starter
 
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Thank you VERY much.  Now that I see the anser it makes total sense and I can show her how to do it.  I can usually figure it out with the examples they give, but sometimes the way I was taught to do things conflicts with how she was taught and I just end up confusing her.


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#4 of 4 Old 12-02-2010, 09:47 PM
 
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Happy to help!

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