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(4-9x^4)^2
(4 - 9x^4)^2 = (4 - 9x^4) (4 - 9x^4); = 16 - 36x^4 - 36x^4 + 81x^8; = 81x^8 - 72x^4 + 16
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Asked 2/19/2012 11:21:06 AM
Updated 6/20/2014 3:13:38 PM
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(4 - 9x^4)^2

= (4 - 9x^4) (4 - 9x^4);

= 16 - 36x^4 - 36x^4 + 81x^8;

= 81x^8 - 72x^4 + 16
Added 6/20/2014 3:13:38 PM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [6/20/2014 3:21:15 PM]
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