SOLUTION: Solve a) x^4 + x^2 - 6 = 0 Can you please help me out? Thanks so much in advance:)

Question 812941: Solve
a) x^4 + x^2 - 6 = 0

Can you please help me out? Thanks so much in advance:)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Let z = x^2. So z^2 = x^4 (square both sides)

Replace z with x^2 and x^4 with z^2

or

or

or Remember we let z = x^2, so make the proper replacement

or

, , or

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The four solutions are

, , or

Note: is the imaginary number
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