Asked by Kate
how do u find the zeros of x^3+13x^2-16x+8? w/o a calc?
Answers
Answered by
Reiny
I did a quick check for x = ±1, ±2 ±4 and could not get zero,
so it does not factor.
the option now is to graph and estimate the zeros by looking at the graph.
(btw, I ran it through one of the net's "equation solver" pages and got appr. -14 and two imaginary roots.)
without a calculator it would be quite cumbersome to get any accuracy for the zeros.
so it does not factor.
the option now is to graph and estimate the zeros by looking at the graph.
(btw, I ran it through one of the net's "equation solver" pages and got appr. -14 and two imaginary roots.)
without a calculator it would be quite cumbersome to get any accuracy for the zeros.
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