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strojnjashka [21]
3 years ago
8

PLEASE HELP WILL MARK BRAINLIEST!!

Mathematics
1 answer:
stiks02 [169]3 years ago
5 0

Answer:

3.5

Step-by-step explanation:

Locating the median is taking all answers into account then dividing by all possible answers.

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If a polynomial function f(x) has roots -8, 1, and 6i, what must also be a root of f(x)?
Naddik [55]

Answer:

it must also have the root : - 6i

Step-by-step explanation:

If a polynomial is expressed with real coefficients (which must be the case if it is a function f(x) in the Real coordinate system), then if it has a complex root "a+bi", it must also have for root the conjugate of that complex root.

This is because in order to render a polynomial with Real coefficients, the binomial factor  (x - (a+bi)) originated using the complex root would be able to eliminate the imaginary unit, only when multiplied by the binomial factor generated by its conjugate: (x - (a-bi)). This is shown below:

(x-(a+bi))*(x-(a-bi))=\\(x-a-bi)*(x-a+bi)=\\([x-a]-bi)*([x-a]+bi)=\\(x-a)^2-(bi)^2=\\(x-a)^2-b^2(-1)=\\(x-a)^2+b^2

where the imaginary unit has disappeared, making the expression real.

So in our case, a+bi is -6i (real part a=0, and imaginary part b=-6)

Then, the conjugate of this root would be: +6i, giving us the other complex root that also may be present in the real polynomial we are dealing with.

5 0
3 years ago
F(x)= x2 + 6x +15<br> What’s the vertex
solniwko [45]
Answer (-3,6)
#
f(x)=x ² +6x+15
=(x ² +6x+9)+6
=(x+3) ²+6
the vertex:(-3,6)
3 0
3 years ago
Read 2 more answers
A carpet measures 7 meters 3 decimeters in length and 4 meters 2 decimeters in width. What is its area in square meters?
Varvara68 [4.7K]

Answer:

C

Step-by-step explanation:

change decimetres into metres

length - 7.3m

Width - 4.2m

to find an area, do length times width

7.3 x 4.2 = 30.66 square metres

I hope this helped :)

8 0
2 years ago
Read 2 more answers
1. Consider the equation 2 x e x + = . This equation has a solution close to x = 0 .
nadya68 [22]

Answer:

the linear approximation formula is based on the equation of the tangent line of a function at a fixed point. The linear approximation of a function f(x) at a fixed value x = a is given by L(x) = f(a) + f '(a) (x - a).

Step-by-step explanation:

4 0
2 years ago
What is the complete factorization of the polynomial below?<br> x3 + 2x2 + 4x + 8
telo118 [61]

Answer:

i think its D

sry if im wrong

step-by-step explanation:

5 0
2 years ago
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