Question
What are the real and complex solutions of the polynomial equation?
x^4 - 41x^2= -400
x^4 - 41x^2= -400
Answers
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.