Is 2 a root of the polynomial? x^4 + 2x^3 - 9x^2 - 2x + 8

1 answer:

6 0

Yes.

first factor, it’ll come out to:
(x+1)(x-1)(x-2)(x+4)

then just solve each individual factor, but the only one you’re interested in is (x-2) so:

x-2=0
x=2

2 is a root of that polynomial
(the other roots are -1, 1, and -4)

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Alice works at a health care facility. She has measured the hemoglobin levels of 200 people. The data follows a normal distribut

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This is a normal distribution with a Mean: 14 g/dL and a Standard deviation: 1 g/dL.
A ) Hemoglobin levels less than 13:
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0.16 x 200 = 32
Answer: 32 people.
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0.50 x 200 = 100
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3 years ago

Find the arc length of the partial circle.

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1/2pi

Step-by-step explanation:

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3 years ago

You and four friends go to a concert. in how many ways can you be seated

trapecia [35]

5 people
slot method
assuming 5 seats
5 choices for 1st seat
4 choices for 2nd
3 for 3rd
2 for 4th
1 for 5th

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120 ways

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3 years ago

What is the square root of 1/25

wolverine [178]

First simplify the square root of 1/25

-√1/25

Rewrite using the quote by rule for radicals.

-√1/√25

Any root of 1 is 1

-1/√25

Simplify the denominator. (find the square root of 25)

-1/5

The result can be shown in both exact and decimal forms.
Exact form: -1/5
Decimal form: -0.2