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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