SOLUTION: Which of the following t^4-81?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Which of the following t^4-81?      Log On


   

Question 5529: Which of the following t^4-81?
Answer by Abbey(339) About Me  (Show Source):
You can put this solution on YOUR website!
There are no following numbers in this equation... did you forget to type something?
this factors as the difference of squares:
(%28t%5E2%2B9%29%28t%5E2-9%29
and t%5E2-9 factors again to the difference of squares, so the final answer is
%28t%5E2%2B9%29%28t-3%29%28t%2B3%29