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Nookie1986 [14]
3 years ago
13

.....................

Mathematics
2 answers:
Shalnov [3]3 years ago
8 0

Answer:

.................. is answer

baherus [9]3 years ago
7 0

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What are the roots of the polynomial equation x3 - 6x = 3x2 - 8? Use a graphing calculator and a system of equations.
makkiz [27]

Answer:

d : 4, 1, -2.

Step-by-step explanation:

There's no need for a calculator in my opinion because we can use the rational root theorem which states that the equations of this form:

\sum_{i=0}^{n} a_{i}x^i = 0 = a_{0} + a_{1}x + a_2x^2 + ... + a_nx^n = 0\\ a_i \in \mathbb{Z}

Have rational roots, than the roots are of the form: \frac{k \cdot a_o}{p \cdot a_n}, \ where \ k, p \in \mathbb{Z}.

Rewriting the equation we have:

x^3 - 3x^2 -6x + 8 = 0\\By \ our\ previous \ claim \ x \in D_8 \ where \ D_n \ the \ set \ of \ divisors \ of \ n.\\D_8 = \{\pm 1, \pm 2, \pm 4, \pm 8\} \\We \ plug \ in \ some \ number from \ D_8.\\Letting \ x = -2;\\(-2)^3 -3(-2)^2 -6(-2) + 8 = 0 \ \ \ Thus \ x+2 \ is \ a \ factor.\\We \ can \ now \ simplify \ the \ eq. \ using \ Polynomial \ Long \ Division.

x^3 -3x^2 -6x + 8 = (x+2)(Q(x))\\To \ find \ Q \ we \ divide \ the \ original \ equation \ by \ x + 2; which \ yields:\\Q(x) = x^2 - 5x + 4.\\So \ we \ can \ use \ the \ quadratic \ formula \ to \ find \ the \ roots:\\x = 4,x = 1. \\Thus \ x \in \{-2, 1, 4\}. \ \ These \ are \ all \ the \ roots.

5 0
4 years ago
*PLEASE HELP ASAP*
nasty-shy [4]

Answer:

i took the test an the answer is A

Step-by-step explanation:

The median score of Class A is greater than the median score of Class B.

8 0
3 years ago
What is the value of x?<br> Enter the correct value.
lara31 [8.8K]

Answer:

x = 5

Step-by-step explanation:

As it is parallelogram And we can see the diagonals bisect each other and are divided into equal parts so

2x = 15 - x

2x + x = 15

3x = 15

x = 15 / 3

x = 5

3 0
3 years ago
3+(55-111)/25 equals what
Ket [755]

Answer:

0.76

Step-by-step explanation:

3+(55-111)/25

=3+(-56)/25

=3+ (-2.24)

=0.76

7 0
3 years ago
Read 2 more answers
angel earned 70 dollars mowing lawns, which is 140 percent of the amount george earned. how much money did george earn.
SOVA2 [1]
50 dollars lol xD u still need help?
8 0
3 years ago
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