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Rainbow [258]
3 years ago
9

Graph of a cubic polynomial that falls to the left and rises to the right with x intercepts negative 2, negative 1, and 2

Mathematics
2 answers:
xz_007 [3.2K]3 years ago
6 0
Hello,

A cubic polynomial with -2,1,2 as roots is
f(x)=k*(x+2)(x+1)*(x-2)=k(x²-4)(x+1)=k(x^3+x²-4x-4)

Looking the answers ==>k=1


==>Answer A
vitfil [10]3 years ago
3 0

Answer:

f(x)=x^3+x^2-4x-4

Step-by-step explanation:

Graph of a cubic polynomial that falls to the left and rises to the right with x intercepts negative 2, negative 1, and 2

x intercepts are -2, -1, 2

We write the x intercepts in factor form

f(x)= (x-p)(x-q)(x-r)

where p, q and r  are the x intercepts

f(x)= (x-(-2))(x-(-1))(x-2)

f(x)= (x+2)(x+1)(x-2)

now we multiply the parenthesis using FOIL method

(x+2)(x+1)= x^2 +2x+x+2= x^2+3x+2

f(x)= (x^2+3x+2)(x-2)

now we multiply with (x-2)

x^3-2x^2 +3x^2-6x+2x-4

combine like terms

f(x)=x^3+x^2-4x-4

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Find the derivative of g(y)=(y-4)*(2y+y^2)
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Answer:

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Step-by-step explanation:

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1 year ago
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Step-by-step explanation:

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The results of a survey indicate that the true proportion of households who want a park in their neighborhood is likely in the i
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Answer:

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Step-by-step explanation:

What are you giving there is a confidence interval. You can obtain a confidence interval based on a sample you got. The length of the confidence interval is determined on how much confidence do you want for your interval (the probability of the real value being inseide the interval) and how big is the sample: the bigger the sample, the smaller the length of the confidence interval. Independently of the sample length, all intervals are centered on the average value you got for the sample, and that is your estimate. In this case, the center of the interval is 0.52+0.8/2 = 0.66.

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