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#### Raerin

##### Member

- Oct 7, 2013

- 46

To justify the answer do you need to make a sin chart and graph it?

- Thread starter Raerin
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- Thread starter
- #1

- Oct 7, 2013

- 46

To justify the answer do you need to make a sin chart and graph it?

- Feb 21, 2013

- 739

How do you solve third degree polynom? Do you know what rational root Theorem is?

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- #3

- Mar 5, 2012

- 9,485

Hi Raerin!

To justify the answer do you need to make a sin chart and graph it?

The usual approach is to first solve the equality.

Then take the derivative and find its roots.

Then you can make a sign chart to read off the solution (did you mean a sign chart instead of a sin chart?)

The first step is already not so easy for this particular problem.

As

Do you know of it?

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- #4

- Oct 7, 2013

- 46

Hi Raerin!

The usual approach is to first solve the equality.

Then take the derivative and find its roots.

Then you can make a sign chart to read off the solution (did you mean a sign chart instead of a sin chart?)

The first step is already not so easy for this particular problem.

AsPetrussuggested, the easiest way to find the roots is by using the Rational root theorem.

Do you know of it?

Oops, I made a typo, so yes, I do mean sign chart.

You're supposed to bring everything to one side, right? Then you find the number that would make the polynomial = 0?

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- #5

- Mar 5, 2012

- 9,485

Yep!Oops, I made a typo, so yes, I do mean sign chart.

You're supposed to bring everything to one side, right? Then you find the number that would make the polynomial = 0?