Asked by Anonymous
                What are the real and complex solutions of the polynomial equation? 
x^4 - 41x^2= -400
            
        x^4 - 41x^2= -400
Answers
                    Answered by
            bobpursley
            
    x^4 - 41x^2+400 =0
x^2= 41+-sqrt(1681-1600))/2
x^2= 21, or 20
x=+- sqrt 21, or +-sqrt20
looks like four real roots.
    
x^2= 41+-sqrt(1681-1600))/2
x^2= 21, or 20
x=+- sqrt 21, or +-sqrt20
looks like four real roots.
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