SOLUTION: Can you please help me solve this? I have to solve for all roots. {{{x^4-5x^2-24=0}}}

Question 189607: Can you please help me solve this? I have to solve for all roots.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve for x:

You can write this as a quadratic equation with a temporary change of variable, thus...
Let so that , then you substitute...
Factor this...
Apply the zero product rule:
or so that...
or Now substitue back so you have...
or and...
, or ,
The roots are:

where:
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