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Lelu [443]
2 years ago
11

The graph of f(x)=2x^3+x^2-4x-2 is shown. How many of the roots of f(x) are rational

Mathematics
2 answers:
Alexeev081 [22]2 years ago
7 0

We can one theorem to help us find rational roots of this polynomial.

2x^3 + x^2 - 4x - 2

We'll use Descartes' rule of signs.

Because there is 1 sign change, 1 of the 3 roots will be positive.

Now we can make the value of x -1 to see how many negative roots there will be.

-2  + 1 + 4 - 2

There are 2 sign changes, so we know there will be 2 negative roots.

Because of this, we should have 3 real, rational roots.

ohaa [14]2 years ago
6 0

Answer:

The answer is 1

I don't know the step-by-step explanation

Step-by-step explanation:

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Answer:

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1 year ago
William got scores of q sub 1, , and q sub 3 on three quizzes.
USPshnik [31]

Answer:

a. The average is  =(++) .

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Step-by-step explanation:

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3 years ago
The scale on a map is 2cm= 1km. Express this as a ratio
Lemur [1.5K]
This would mean that the ratio is 2:1 or 2 to 1 or also 2/1.

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3 years ago
The size of a cell is typically found by capturing an image under a microscope then using software to measure its diameter. Two
nika2105 [10]

Answer:

  7.789×10^-2 = 0.07789 cm

Step-by-step explanation:

Your calculator can find the difference of the two given diameters and express it in any format you like.

The attached image of a calculator display shows the difference of the cell diameters is 0.07789 = 7.789×10^-2 cm.

__

The difference of two numbers with different exponents is found by first adjusting the exponents so they are the same. Here, we choose to adjust both numbers so they have the highest exponent value.

  8.83×10^-2 - 6.01×10^-3

  = 8.39×10^-2 - 0.601×10^-2 = (8.39 -0.601)×10^-2 = 7.789×10^-2

Alternatively, you can convert both numbers to standard form and do the subtraction that way.

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  = 0.0883 -0.00601 = 0.07789

_____

<em>Additional comment</em>

The second attachment shows the relationship between place values and their multiplier in scientific notation.

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The choice of exponent when computing the sum or difference of numbers in scientific notation is usefully informed by an estimate of the value of the sum or difference. A proper choice can avoid the need to adjust the exponent of the result of the operation. Here, we see the subtraction will change the larger value by less than 10%, so the exponent of the result in scientific notation will be that of the larger value (-2).

3 0
2 years ago
<img src="https://tex.z-dn.net/?f=13%20%3D%20w%20-%2014%20%5Cdiv%202" id="TexFormula1" title="13 = w - 14 \div 2" alt="13 = w -
Daniel [21]
Your answer is going to be 21 u just subract from the number to get ur answer
6 0
3 years ago
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