How do you use the rational root theorem to find the roots of #x^4 – 7x^2 + 12 = 0#?
1 Answer
Oct 28, 2015
Evaluation of
gives the roots
Explanation:
According to the Rational Root Theorem in its simplified form
when
if
For the given example, this means that any rational root of
The factors of
We can test each of these factors (as I did with Excel, below) to find all rational roots of