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zvonat [6]
3 years ago
11

Is the binomial a factor of the polynomial function? f(x)=x3+2x2−16x−32

Mathematics
2 answers:
goblinko [34]3 years ago
8 0
Since it is x^3 cubed it has 3 maximum roots
by the zero multiplication property of function
if you plug find a root then you can deduce it is a factor in other words if f(x)=(x-a)(x-b)
then f(a)=0 and f(b)=0
so
f(2)=8+8-32-32= -48 therefore it is not a factor
f(-2)=-8+8+32-32=0 hence it is a factor
f(4)=64+32-64-32=0 it is a factor
f(-4)=-64+32+64-32=0 it is a factor
f(-6) it is not a factor via the fundmental therom of algebra
f(x)=(x+2)(x-4)(x+4)
=(x^2-16)(x+2)=x^3+2x^2-16x-32 which checks our work
umka21 [38]3 years ago
3 0

Answer:  (A) No, (B) Yes, (C) Yes, (D) Yes, (E) No.

Step-by-step explanation:  We are given to whether each binomial is a factor of the following polynomial or not :

f(x)=x^3+2x^2-16x-32.

To select the correct factors, we need to factorize the given polynomial.

We will be using the following factorization formula :

a^2-b^2=(a+b)(a-b).

We have

f(x)\\\\=x^3+2x^2-16x-32\\\\=x^2(x+2)-16(x+2)\\\\=(x+2)(x^2-16)\\\\=(x+2)(x^2-4^2)\\\\=(x+2)(x+4)(x-4).

Therefore, the factors of the given polynomial are (x + 2), (x + 4) and (x - 4).

Thus,

<em><u>option (A) : (x - 2)</u></em>

No.

<em><u>option (B) : (x + 2)</u></em>

Yes.

<em><u>option (C) : (x - 4)</u></em>

Yes.

<em><u>option (D) : (x + 4)</u></em>

Yes.

<em><u>option (A) : (x + 6)</u></em>

No.

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Is - 5/12 equivalent to 5/-12
Kamila [148]

Answer:

Yes

Step-by-step explanation:

-5/12 is the same as saying 5/-12

Hope this helps! have a nice day! Please consider making me Brainliest

5 0
3 years ago
The next stop on the road trip is the zoo! jacob goes to find his favorite animal, the giraffe. jacob wonders how tall the talle
lapo4ka [179]
1 foot = 12 inches
Height of Jacob = 5 feet 6 inches = 5 *12 + 6 = 66 inches
Jacob's <span>shadow = 3 feet = 36 inches

</span>giraffe's shadow = <span>5 feet 9 inches = 5 * 12 + 9 = 69 inches

</span><span>by the ratio and proportion

∴ </span>Height of Jacob/Jacob's shadow = Height of giraffe/giraffe's shadow

∴ 66/36 = Height of giraffe/69

∴ Height of giraffe = 69 * 66/36 = 126.5 inches = 10 feet 6.5 inches
3 0
3 years ago
A survey was conducted in the United Kingdom, where respondents were asked if they had a university degree. One question asked,
katovenus [111]

Answer:

z=\frac{0.121-0.0892}{\sqrt{0.101(1-0.101)(\frac{1}{373}+\frac{1}{639})}}=1.620  

p_v =2*P(Z>1.620)=0.105  

If we compare the p value and using any significance level for example \alpha=0.05 always p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the the two proportions are not statistically different at 5% of significance

Step-by-step explanation:

Data given and notation  

X_{1}=45 represent the number of correct answers for university degree holders

X_{2}=57 represent the number of correct answers for university non-degree holders  

n_{1}=373 sample 1 selected

n_{2}=639 sample 2 selected

p_{1}=\frac{45}{373}=0.121 represent the proportion of correct answers for university degree holders  

p_{2}=\frac{57}{639}=0.0892 represent the proportion of correct answers for university non-degree holders  

z would represent the statistic (variable of interest)  

p_v represent the value for the test (variable of interest)

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the proportions are different between the two groups, the system of hypothesis would be:  

Null hypothesis:p_{1} = p_{2}  

Alternative hypothesis:p_{1} \neq p_{2}  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{45+57}{373+639}=0.101

Calculate the statistic

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.121-0.0892}{\sqrt{0.101(1-0.101)(\frac{1}{373}+\frac{1}{639})}}=1.620  

Statistical decision

For this case we don't have a significance level provided \alpha, but we can calculate the p value for this test.  

Since is a one side test the p value would be:  

p_v =2*P(Z>1.620)=0.105  

If we compare the p value and using any significance level for example \alpha=0.05 always p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the the two proportions are not statistically different at 5% of significance

7 0
3 years ago
Is this factorable please help me.
olga2289 [7]
This can be factored into (2t - 9)(t + 7)
7 0
3 years ago
What's the simplest form for 10/16
natta225 [31]
5/8 would be the simplest form for 10/16 .
8 0
3 years ago
Read 2 more answers
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