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1. Factor Theorem
Below is the question which I'm stuck on:

Find a and b given that
and are factors of

The following is my working out which is a bit simplified:

--------------------------------------------------

--------------------------------------------------

I solved the above simultaneous equations to get the following:

The values I get for a and b are wrong. What have I done wrong in my working out?????

Thanks a lot.
2. Re: Factor Theorem
In the second equation, it is (-1/3) all squared, you are just squaring the bottom so you haven't got rid of the negative.

I think!?
3. Re: Factor Theorem
the above poster is right, and you also made a mistake when solving the simultaneous equations you got, i think.
4. Re: Factor Theorem
(Original post by krisshP)
Below is the question which I'm stuck on:

Find a and b given that
and are factors of

The following is my working out which is a bit simplified:

--------------------------------------------------

--------------------------------------------------

I solved the above simultaneous equations to get the following:

The values I get for a and b are wrong. What have I done wrong in my working out?????

Thanks a lot.
Forgot to quote you in original post to draw attention!
Last edited by flown_muse; 12-07-2012 at 15:18.
5. Re: Factor Theorem
(Original post by flown_muse)
In the second equation, it is (-1/3) all squared, you are just squaring the bottom so you haven't got rid of the negative.

I think!?
Thanks a lot

I give it a shot and see what happens
6. Re: Factor Theorem
(Original post by Phredd)
the above poster is right, and you also made a mistake when solving the simultaneous equations you got, i think.
The mistake in the simulataneous equations is probably due to error carried forward.

thanks
7. Re: Factor Theorem
Phredd and Flown_muse thanks alot

I end up getting the following as the answer due to your help:

a=4
b=-5

8. Re: Factor Theorem
(Original post by krisshP)
Phredd and Flown_muse thanks alot

I end up getting the following as the answer due to your help:

a=4
b=-5

The number of times an arithmetic error has ruined everything for me is ridiculous!
9. Re: Factor Theorem
(Original post by krisshP)
Below is the question which I'm stuck on:

Find a and b given that
and are factors of

The following is my working out which is a bit simplified:

--------------------------------------------------

--------------------------------------------------

I solved the above simultaneous equations to get the following:

The values I get for a and b are wrong. What have I done wrong in my working out?????

Thanks a lot.
You have turned an easy sum into one which is more difficult.
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10. Re: Factor Theorem
(Original post by flown_muse)

The number of times an arithmetic error has ruined everything for me is ridiculous!
lol

annoying arithemetic errors
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