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Mathematics 10 Online
OpenStudy (anonymous):

help !!!!

OpenStudy (anonymous):

Nnesha (nnesha):

use the p/q method where \[\large\rm \frac{ p }{ q}= \frac{\pm ~~all~factors ~of~constant~term}{\pm~~all~factors ~of ~leading ~coefficient }\]

OpenStudy (anonymous):

the leading coefficient is 8 and 10 right?

Nnesha (nnesha):

there should be only one leading coefficient coefficient of the highest degree variable

OpenStudy (anonymous):

10?

Nnesha (nnesha):

what's the highest degree (exponent ) ??

OpenStudy (anonymous):

8 sorry

Nnesha (nnesha):

yes correct write all factors of 8 and factors of constant term

OpenStudy (anonymous):

3x^4+10x^3-11x^2-10x / 8?

Nnesha (nnesha):

no. what's the constant term in that function ?

OpenStudy (anonymous):

x?

Nnesha (nnesha):

that's the variable what would be the leading coefficient and constant term? here is an example \[4x^2+3x+9\] 4 is leading coefficient(coefficient of highest degree variable ) cosntant term is 9( number without any variable )

Nnesha (nnesha):

constant*

OpenStudy (anonymous):

8 is the constant

Nnesha (nnesha):

correct and leading coefficient is ?

OpenStudy (anonymous):

11x^2

Nnesha (nnesha):

what's the highest exponent in that function ? if u look at my example it was 2 so that's how leading coefficient was 4 \[\large \rm Ax^5+Bx^3+C\]in this example highest exponent is 5 leading coefficient is `A`

OpenStudy (anonymous):

3x^4

Nnesha (nnesha):

that's the term where just 3 is leading coefficient and now what are the factors of 8 and 3 ?

jimthompson5910 (jim_thompson5910):

@Nnesha is correct. Here is a slightly different way to look at it

OpenStudy (anonymous):

you divide 8/3?

OpenStudy (anonymous):

question (not to interrupt) does not ask for the "possible" rational zeros, it asks for the zeros

Nnesha (nnesha):

no divide factors of 8 by the factors of of 3 i know they r looking for real zero so she can just graph it

OpenStudy (anonymous):

it is not necessary to list all possible rational zeros of this, in fact it is mostly a waste of time you want to find the actual zeros, not the possible rational ones, as there are many

OpenStudy (anonymous):

unless you want to make a to see which ones to check

OpenStudy (anonymous):

"make a list"

jimthompson5910 (jim_thompson5910):

@satellite73 the idea is to generate all the possible rational roots then you check each possible root in f(x). If f(x) = 0, then you have a true actual root it might be easier just to go through your answer choices

OpenStudy (anonymous):

i would certainly say so!!

OpenStudy (anonymous):

huh?

OpenStudy (anonymous):

you have choices right? check which ones work

OpenStudy (anonymous):

how do i check?

OpenStudy (anonymous):

plug in the number

OpenStudy (anonymous):

see if you get zero

OpenStudy (anonymous):

?

Nnesha (nnesha):

|dw:1449286024847:dw| zeros (or x-intercept ) point when graph intersect the x-axis when y=0 so you can substitute given points for x if you get 0 as final answer then that number would be the zero

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