SOLUTION: ((( x^4 -x^2 -12 = 0)))) Can you please help me with this problems

Question 32359: ((( x^4 -x^2 -12 = 0)))) Can you please help me with this problems
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve:
Rewrite this as a quadratic equation by temporarily substituting .
Solve by factoring.
Apply the zero products principle.
and/or
If then
If then
But, , so:
Take the square root of both sides.
and
Take the square root of both sides.
and
The four roots are:

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