SOLUTION: x(to the 4th power)-6x(squared)-27=0. whats the answer?

Question 551480: x(to the 4th power)-6x(squared)-27=0. whats the answer?
Found 2 solutions by josmiceli, KMST:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

Make the substitution

( I solved by looking at it )

and

and

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The solutions are:

Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!

Factoring

Two of 4 solutions come from
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The other two solutions come from
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