Question

Approximate the real number solutions to the polynomial function f(x) = x3 – 4x2 – 4x + 16 .

x = –4, x = –2, x = 2

x = –2, x = 2, x = 4

x = –4, x = –2, x = 4

x = –4, x = 2, x = 4

Answer 1

hi young lady, may I help you?

Answer 2

yes please, thank you

Answer 3

big offer, want to study or answer? have any idea?

Answer 4

i have no idea how to solve this.
I would like to know both how to do it and also get the answer

Answer 5

do you know horner's rule?

Answer 6

no

Answer 7

wait, I will scan the stuff, take a look, think and let me know where you stuck, ok?

Answer 8

ok thank you so much!!

Answer 9

here,

Answer 10

thx

Answer 11

okay so here's my work i used synthetic division....

2 | 1....4....-4....-16
...........2....12....16
______________
.....1....6.....8...| 0

then I factored out the x-2 and got this.... (x-2)(x^2+6x+8)

did some more factorization... (x-2)(x^2+6x+8)
(x-2)(x+2)(x+4)

and i got x=-4, -2, 2 as my answer

How'd I do? Am I correct?

Answer 12

next

Answer 13

thx so did i get it?

Answer 14

yep its seems we got the same answer! :D

Answer 15

it*

Answer 16

nope, young lady, you miss the negative sign at the first 4( the coefficient of x^2) so, you mess up there, sorry for saying that.

Answer 17

oh okay

Answer 18

re check, very easy to make mistake.

Answer 19

thx

Answer 20

I would like to know whether you understand or not? if you want to guess, do it. but I don't want you go on that way. You should know why and how to get the answer.

Answer 21

ok im good! thanks for writing it out like that its really helpful to see the actual process!

Answer 22

glad to hear!! glad to be helpful to you!!