SOLUTION: I need a little help on where to continue on this problem x^4 - 81 I got down to (x^2-9(x^2+9) Where do I go from there?

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: I need a little help on where to continue on this problem x^4 - 81 I got down to (x^2-9(x^2+9) Where do I go from there?      Log On


   

Question 221643: I need a little help on where to continue on this problem
x^4 - 81
I got down to (x^2-9(x^2+9)
Where do I go from there?
Found 2 solutions by sofiyac, stanbon:
Answer by sofiyac(983) About Me  (Show Source):
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x^4 - 81
I got down to (x^2-9)(x^2+9)
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Factor again to get:
= (x-3)(x+3)(x^2+9)
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Cheers,
Stan H.