Kaelyn1636 Kaelyn1636
  • 21-09-2020
  • Mathematics
contestada

Knowing that –3 is the root of P (x) = x³ + 4x² - ax + 1, calculate the value of a and mark the correct answer.

Respuesta :

MollieToliver MollieToliver
  • 23-09-2020

Answer:

value of a is -3.33

or in fraction -10/3

Step-by-step explanation:

If -3 is the root of P(x)

then

P(-3) = 0

then we substitute -3 in place of x in the given equation

P (x) = x³ + 4x² - ax + 1

P (-3) = -3³ + 4*-3² - a(-3) + 1

=> 0 = -27 + 36  + 3a + 1

=> 0 = 10 + 3a

=> 3a = -10

=> a = -10/3 = -3.33

Thus, value of a is -3.33

Answer Link

Otras preguntas

True or false: the /etc/group file supports linking each user to a maximum of one group.
(a+b)^5/a-2b^2 if a = 6 and b = -8
What controls the passage of chyme from the last region of the stomach to the duodenum?
Congress holds a committee hearing to investigate how the department of energy enforces their policy on the disposal of nuclear waste. what is this process call
please answer quick, ill give first person to answer brainliestShould designers of Olympic medals use other elements to make an Olympic medal? Use your knowledg
A physiologist testing signal transduction rates in two different nerve fibers notices that one fiber conducts signals much faster than the other. which is the
Patients in outpatient treatment centers and day treatment programs __________. a. attend meetings at hospitals b. live at home
What are the advantages and disadvantages of foreign investing? how does an adr help overcome the disadvantages?
In the digestive system, hcl is released by ________, whereas hco3 - is secreted primarily from the
PLs help need this asap