Author Topic: A2 MATHS  (Read 1659 times)

Offline preity

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A2 MATHS
« on: October 05, 2009, 04:48:56 am »
hi..could someone help me with this question....
1)The polynomial x^4+4x^2+x+a is denoted by p(x).It is given that x^2+x+2 is a factor of p(x).Find the value of a and the other quadratic factor of p(x).
I need someone to show me the way using lonG division...thanks

Offline Ghost Of Highbury

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Re: A2 MATHS
« Reply #1 on: October 05, 2009, 05:12:28 am »
are u sure if the q is correct....because x^2 + x + 2 has no real roots.
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Offline preity

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Re: A2 MATHS
« Reply #2 on: October 05, 2009, 05:29:12 am »
tat's wat the question says... :)

Offline Ghost Of Highbury

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Re: A2 MATHS
« Reply #3 on: October 05, 2009, 05:47:10 am »
have u learnt to express a non-real root in the form of 'i' ??
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Offline preity

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Re: A2 MATHS
« Reply #4 on: October 05, 2009, 05:49:27 am »
ermm... the question is from algebra the 1st topic...

Offline Ghost Of Highbury

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Re: A2 MATHS
« Reply #5 on: October 05, 2009, 05:58:33 am »
ya...it is from algebra...but when dey r asking abt th roots of the quadratic equation

u get --> 2.64575131 i ......that is exactly y i asked have u learnt 'i' ?????
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nid404

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Re: A2 MATHS
« Reply #6 on: October 05, 2009, 08:15:31 am »
You can find out roots using the discriminant too

Offline loggerhead

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Re: A2 MATHS
« Reply #7 on: October 05, 2009, 08:39:03 am »
i wrote it up on a open office document because it was easier so I'm not sure if everything will line up on Microsoft Office

Offline astarmathsandphysics

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Re: A2 MATHS
« Reply #8 on: October 05, 2009, 08:54:06 am »
I will do this question when i get to a pc in am hour.

Offline astarmathsandphysics

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Re: A2 MATHS
« Reply #9 on: October 05, 2009, 10:07:51 am »
Here is the pdf version of the above

Offline astarmathsandphysics

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Re: A2 MATHS
« Reply #10 on: October 05, 2009, 10:11:44 am »
and the ms office version

Offline preity

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Re: A2 MATHS
« Reply #11 on: October 06, 2009, 04:13:16 am »
thanks astar...i've got another question it's from the may/june 03 paper...|x-2|less than 3-2x..my question is do i have to square both sides?

Offline loggerhead

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Re: A2 MATHS
« Reply #12 on: October 06, 2009, 05:07:53 am »
no you don't but you can.

the way i like to do it is find the CV's by solving the equations:

x - 2 = 3 - 2x         and        x - 2 = - 3 + 2x


both this method and squaring give the same CV's but this way is faster as there is no quadratic.

Offline astarmathsandphysics

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Re: A2 MATHS
« Reply #13 on: October 06, 2009, 07:18:45 am »
You are correct. I also prefer this way.