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inessss [21]
3 years ago
14

I just need the answer :)

Mathematics
1 answer:
kati45 [8]3 years ago
5 0

Answer:

3h12k2/2

Step-by-step explanation:

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What are all of the real roots of the following polynomial? f(x) = x4 - 13x2 + 36
GREYUIT [131]
ANSWER

A. -3, -2, 2, and 3

EXPLANATION

The given polynomial function is,

f(x) = {x}^{4} - 13 {x}^{2} + 36

To find the real roots, we equate the function to zero to obtain;

{x}^{4} - 13 {x}^{2} + 36 = 0

We can solve this equation as a quadratic equation in
{x}^{2}.

Thus we rewrite the equation as,

({x}^{2})^{2} - 13 {x}^{2} + 36 = 0

We split the middle term to get,

({x}^{2})^{2} - 9 {x}^{2} - 4 {x}^{2} + 36 = 0.

We factor to get,

{x}^{2} ( {x}^{2} - 9) - 4( {x}^{2} - 9) = 0

We factor to get,

( {x}^{2} - 9)( {x}^{2} - 4) = 0

Either

{x}^{2} - 9 = 0
or

{x}^{2} - 4 = 0

x = \pm \sqrt{9} \: or \: x = \pm \sqrt{4}
x = \pm3 \: or \: x = \pm2

x=-3,-2,2,3

The correct answer is A
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3 years ago
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As a surveyor, you measure an angle of elevation as 35.25 degrees. You are required to record all measurements in fraction form.
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(0,0) is the y intercept

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A jar contains many coins. The probability that a coin randomly selected from the jar is a penny is 10%. A week later, the proba
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If A+B+C=180 Prove that Sin2A+Sin2B+Sin2C=4sinASinBSinC<br>​
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