Math Is Fun Forum

4littlepiggiesmom

Member

Registered: 2006-01-09

Posts: 42

Simplifiy the expression..please help dad says they all need more info

I think I;ve got these right but mom's gone for the week and dad won't even look at math over 4th grade??? So please if any one could tell me if I have these right and just tell me which are wrong so I can try firguring the ones I have wrong again! APB   The instructions on 2-58 just say Simplifiy the Expression...

1.(x+3)/(x^3-x^2-6x) Divided by  ((x^2-9)/ x^2+x-12)= (x+4)/ (x)(x+2)(x-3)

2. (x^3+x^2)/(x^2-16)  *  (x+4)/(3x^4+x^3-2x^2) = 1/(x-4)

3.(12x-4)/(x-1)  +  (4x)/(x-1) = 48x

4. (5)/(2x^2)  + (4)/(3x)  =  (8x+15)/(6x^2)

5. (4)/(x+3)  +  (3x)/(x-2) = (3x^2+4x+1)/(x^2 +x-6) Should I simplifiy that down  to (3x+1)(x+1)/(x+3)(x-2) or not???

6. (5x+1)/(x-3) - (2x)/(x-1)  =  (7x^2-4x-3)/(x^2-4x+3)  I haven't broken it down as I can't tell if I;m suppose to?

I just gave them number 1-6 out of 56 I have done! The rest look right but these 6 I'm not sure on!

Again please just tell me if I'm right as I really want to figure them out by myself! Thanks... APB

krassi_holmz

Real Member

Registered: 2005-12-02

Posts: 1,905

Re: Simplifiy the expression..please help dad says they all need more info

1.

2.

3.

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IPBLE:  Increasing Performance By Lowering Expectations.

krassi_holmz

Real Member

Registered: 2005-12-02

Posts: 1,905

Re: Simplifiy the expression..please help dad says they all need more info

4.

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IPBLE:  Increasing Performance By Lowering Expectations.

renjer

Member

Registered: 2006-04-29

Posts: 50

Re: Simplifiy the expression..please help dad says they all need more info

You got the numerator in your answer wrong for 5 and 6, that's according to Scientific Workplace.

Btw, how do you enter the equations directly in here? I tried using the Latex syntax to do it but it wouldn't display properly.

Last edited by renjer (2006-05-05 16:26:07)

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,424

Re: Simplifiy the expression..please help dad says they all need more info

renjer,
To view how LaTeX is used, you can try using 'quote' of a message in which it has been used.

For example,

would produce

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

renjer

Member

Registered: 2006-04-29

Posts: 50

Re: Simplifiy the expression..please help dad says they all need more info

I didn't know you had to put them in [math] tags.

Last edited by renjer (2006-05-05 19:59:25)