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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

For problems 1-10, solve the given rational equation show work

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

Hi;

Welcome to the forum;

For the first one:

Cross multiply

Divide by 9.

Want to try the second one on your own?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

I have the answers I just don't know if they are right so can you do the second question like the first question

so I can know how to do the rest

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Cross multiply

Subtract 15 from both sides

Divide both sides by 3

*Last edited by Agnishom (2013-09-04 03:26:56)*

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'Humanity is still kept intact. It remains within.' -Alokananda

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

Use the quadratic formula to solve the equation. Find the exact solutions. Show your work.

1. x2 4x + 3 = 0

2. 3x2 + 2x 1 = 0

3. 8x2 2x 3 = 0

4. 2x2 5x 3 = 0

5. 6x2 5x 1 = 0

6. x2 + 8x + 12 = 0

7. x2+ 10x = -25

8. x(x 5) = -4

Can you do it so I can make sure that I am right

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Not really. That would be a great wastage of time.

where the polynomial is in the form ax^2 + bx + c

For the first one, a = 1, b= -4 and c = 3

Try to put the values of a, b and c in the formula

*Last edited by Agnishom (2013-09-04 06:05:41)*

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'Humanity is still kept intact. It remains within.' -Alokananda

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

Hi Derick Mixon;

What answers did you get?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

3,1

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,393

hi Derick Mixon

Those answers are correct for Q1.

Now try another.

You might find this page helpful:

http://www.mathsisfun.com/algebra/facto … atics.html

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

2.33333, -3

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

Hi;

Those are the roots of

that does not appear to be in your list. Can I see how you got that?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

number 2

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

Hi;

Those are not the roots for number 2. How did you get your answer?

What are they teaching you, factoring or the quadratic formula?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

I have no clue can you help me out

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

I have no clue can you help me out

Of course I can, they used to call me "Mr Equation," because there was no equation I could not solve.

What are they teaching you, factoring or quadratic formula?

What have you been taught so far?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

quadratic formula

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

.333333, 1 is that answer

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

That is real close except you have a wrong sign!

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

,-1

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

That is correct! You must be careful with your arithmetic.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

Aye man Im kinda in a hurry to get finshed with these course because its causing me to be ineligible for football and I am about to loose a scholarship from Wofford and Clemson you think you me through the last little bit of lesson I have?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

I will do you that favor but I am opposed to it. Athletics are great but they are fleeting. A guy's body can only last so long. An education lasts a lifetime.

The answers will be posted for 3 to whatever.

I hope my statements above will not be ignored.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

Can you give me the answers and work for the lesson to see if I have the correct answers?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,636

The answers have been posted in post #22.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Derick Mixon****Member**- Registered: 2013-09-03
- Posts: 65

what about the work? and does that start from 3 -8?

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