SOLUTION: I need help with this problem. Use Descartes' rule of signs to determine the possible numbers of:
a) Positive real roots of {{{x^4 + x^3 - 3x^2 + x + 2 = 0}}}
b) Negative real ro
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Question 982722: I need help with this problem. Use Descartes' rule of signs to determine the possible numbers of:
a) Positive real roots of
b) Negative real roots of
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Positive case: Two sign changes, so either two positive real roots or zero positive real roots.
Negative case: ^4\ +\ (-x)^3\ -\ 3(-x)^2\ +\ (-x)\ +\ 2\ =\ 0)
which is to say:
Again, two sign changes so there are either two negative real roots or zero negative real roots.
John
My calculator said it, I believe it, that settles it
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