jump to last post 1-4 of 4 discussions (4 posts)

find the value of 'a' if ( x-a) is a factor of x^6-ax^5 x^4-x^3 3x-a 2. When can i get...

answer to this question plse ????Did you miss some operators? Otherwise, are there supposed to be some parentheses around the exponents. I'm not sure what the expression is supposed to be.

You might find it in the textbook you were probably supposed to study.

Would this be x^6+ax^5+x^4-x^3+3x-a2

Assuming this is a binomial expansion ie all terms are a, then

(-a)^6=-2a or a=-(2)^1/5.

However, if this is a binomial expansion. then this says 6a^5=3 and that is not true if a =-(2)^1/5

So lets iterate and let a=1, then assume it is 1 of six possible roots.

Then we have (-1)^6 -a(-1)^5+(-1)^4-(-1)^3+3(-1) -2a=1+a+1+1-3-2a=0

or

-a=0 or -1=0 which means that -1 is not a root and a is therefore not 1.

Lets test a=-1............so we have (1)^6-a(1)^5+(1)^4-(1)^3+3(1)-2a=

1-a+1-1+3-2a=0 and 4+3 does not equal 0

Lets try a=2

We then have(-2)^6-a(-2)^5+(-2)^4-(-2)^3+3(-2)-2a=64+32a+16-8-6-2a which doesn't equal 0..

Without going into specifics, letting a equal any integer larger than 2 will not cause a 0.

I don't believe there is an integer solution for this. I used to have a calculator that would solve this. This is an iterative problem and is solved by converging on the answer.

I don't have the time but would guess a is between 0 and 1. Just an educated guess.

Maybe I don't understand what equation you are using.

This cant be a binomial expansion and it converges above 2 and less than -2. This needs to be iterated until you converge on an answer. Unless someone has a graphing calculator .

Related Discussions

- 217
### Why are we here on Earth ? What am i supposed to do here ?

by Abhishek Raj8 months ago

Why are we here on Earth ?What am i supposed to do here ?that's a spiritual kind of question. But it's haunting me since morning. Everyday we wake up, go to work and then get to sleep. Is that's only the life ? Only...

- 3
### Which show is better, American Idol or X-Factor?

by scoop5 years ago

Which show is better, American Idol or X-Factor?

- 2
### 4^5x-1=2^3(x+11)

by nicole68 years ago

4^5x-1=2^3(x+11)solve for x

- 20
### Sex is supposed to be enjoyable for both the Man & woman . Why don't so many fem

by freecampingaussie2 years ago

Sex is supposed to be enjoyable for both the Man & woman . Why don't so many females enjoy it ?I was really surprised when I read a hub the other day & all the comments that indicated that a lot of females...

- 2
### Find the equation of circle which pass through points (-3,-1) ; (-1,-4)

by ahmadjs226 years ago

Find the equation of circle which pass through points (-3,-1) ; (-1,-4)

- 28
### Why Freud Pisses Me Off And Can Anyone Answer My Questions?

by FinanceLady7 years ago

A while back I was diagnosed with a debilitating mental illness that I inherited genetically from my father and grandmother. I immediately took issue with Freud for two main reasons. One: I blew him off because he did...

Copyright © 2018 HubPages Inc. and respective owners.

Other product and company names shown may be trademarks of their respective owners.

HubPages^{®} is a registered Service Mark of HubPages, Inc.

HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.

terms of use privacy policy (0.4 sec)

working