# Thread: Determining the zeros of x^4 -(x^3) -(31x^x) + x 30. EASY PRECAL PROBLEM

1. ## Determining the zeros of x^4 -(x^3) -(31x^x) + x 30. EASY PRECAL PROBLEM

Correct answer is 1, -1, -5, and 6. SOLVE IT THE SAME WAY AS A PRECAL WOULD -.i.e. using descartes rule of signs, synthetric division,upper bound and lower bound test, rational zero theorem, narrowing down choices using a ti-84 or ti-89 calcutior, or a combination of these methods. IMPORTANT NOTE: Our teacher we can't exclusively use the graphing calculator to determine the zeros of this function.

My work so far:
-plugged in 1 using synthetic devision, determined 1 was a zero. Then got decompressed function on bottom of synthetic division, x^3 -31x + 30.

2. ## Re: Determining the zeros of x^4 -(x^3) -(31x^x) + x 30. EASY PRECAL PROBLEM

http://images.pcmac.org/SiSFiles/Sch...0(day%201).pdf

Above are the notes my teacher wants us to follow while solving this problem.

3. ## Re: Determining the zeros of x^4 -(x^3) -(31x^x) + x 30. EASY PRECAL PROBLEM

It isn't really necessary to post the same thing twice!

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