Hangmansavagd Hangmansavagd

16-08-2016
Mathematics

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which of the following ate factors of t^4-81

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dalendrk dalendrk

16-08-2016

[tex]Use:\ a^2-b^2=(a-b)(a+b)\\------------------\\t^4-81=(t^2)^2=9^2=(t^2-9)(t^2+9)\\\\=(t^2-3^2)(t^2+9)=(t-3)(t+3)(t^2+9)[/tex]

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