SOLUTION: what are the factors. t^4 -81

Question 273059: what are the factors.
t^4 -81
Answer by persian52(161) (Show Source): You can put this solution on YOUR website!
Glad to help you mate!
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t^(4)-81
The binomial can be factored using the difference of squares formula, because both terms are perfect squares.
(t^(2)+9)(t^(2)-9)
The binomial can be factored using the difference of squares formula, because both terms are perfect squares. The difference of squares formula is a^(2)-b^(2)=(a-b)(a+b).
Answer: (t^(2)+9)(t-3)(t+3)
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