#1
sorry for the "scary words"

What should I do here?

(X2+7x-5) / X-2

would it be X2/X = X and 7x/X= 7 and then bring down the -5 and /-2

?

the X2 is X to the 2nd power

thanks

I left class during the lesson so I didn't have any notes
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#2
When did they start adding the alphabet to math?!?!?!?!?!?
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#3
Quote by The_Hottest_Day
When did they start adding the alphabet to math?!?!?!?!?!?


/generic
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#4
x^2 + 7x - 5 / x-2

The coefficient on x^2 is 1, so multiply x-2 by x => x^2 - 2x

Now subtract that from x^2 + 7x - 5 to get 11x - 5.

The coefficient of the x term is 11, so multiply x - 2 by 11 => 11x - 22

Now subtract that from 11x - 5 to get 17, so 17 is your remainder and your quotient is x + 11.

Your answer for x^2 + 7x - 5 / x - 2 = x + 11 + (17/x-2) (if you don't know how I got the 17/x-2, please go ahead and kill yourself.)
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#5
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Well SOOORRRRYYYY!!! Mister GRRR-Man I'm tired and not on the top of my game.
REMEMBER REMEMBER THE 8TH OF NOVEMBER!! I SURVIVED 4CHAN'S INVASION!!
Uneeded Praising Section:
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Why didnt you get cable-less mics?

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lol good call

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^
^ That was at me so yes it is praise.
#6
Quote by darkstar2466
x^2 + 7x - 5 / x-2

The coefficient on x^2 is 1, so multiply x-2 by x => x^2 - 2x

Now subtract that from x^2 + 7x - 5 to get 11x - 5.

The coefficient of the x term is 11, so multiply x - 2 by 11 => 11x - 22

Now subtract that from 11x - 5 to get 17, so 17 is your remainder and your quotient is x + 11.

Your answer for x^2 + 7x - 5 / x - 2 = x + 11 + (17/x-2) (if you don't know how I got the 17/x-2, please go ahead and kill yourself.)


STOP TALKING LIKE THAT!

lol

I was checking the book and it stated that I would divid the X2 and 7X by the X and then get the answer

then bring down the -5 and add to the 7
getting 2

then divide that by the -2 and get -1

the problem is as follows

(X2+ 7x -5)

X-2
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#7
I sound like a book, don't I? I authored an Algebra curriculum for a tutoring place this summer. I'll make a ****ty paint drawing for you and that should clear it up. Wait up for a few minutes.
Quote by denizenz
I'll logic you right in the thyroid.

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#8
I messed up. It should be 9x, not 11x. Sorry about that.

Quote by denizenz
I'll logic you right in the thyroid.

Art & Lutherie
#9
Quote by darkstar2466
I sound like a book, don't I? I authored an Algebra curriculum for a tutoring place this summer. I'll make a ****ty paint drawing for you and that should clear it up. Wait up for a few minutes.


Thanks. Hopefully I can make a connection to the rest of the lesson lol
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#10
Did you see the paint thing?
Quote by denizenz
I'll logic you right in the thyroid.

Art & Lutherie
#12
Quote by darkstar2466
Did you see the paint thing?


Yeah but the next problem is hard.

I didn't really understand what happened with the X^2 and how you got -18

I figure it was from the -2 in the dividend multiplied by the 9

but I'm not good at algebra

the problem I'm on

is

3X^2+11X+1

X-3

and I have 14X+3 as the remainder but I don't how to get the rest of the problem.

I got rid of 3X^2 and add -3X to 11X to get 14X and multiplied the 1 by 3

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#13


That's the last of the help you'll get from me. I have a life to attend to now, go shower, make dinner, go out etc.
Quote by denizenz
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#14
Quote by darkstar2466


That's the last of the help you'll get from me. I have a life to attend to now, go shower, make dinner, go out etc.


Thanks

Did you use FOIL?
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Last edited by TDKshorty at Nov 9, 2007,
#15
I always liked synthetic division better.

since it is (X2+7x-5) / X-2

do the following:

1. line the coefficients up starting from the highest degree to the lowest

ex. 1 | 7 | -5

2. take the 2 out of the x-2 and put it to the left like so:

_ 1 | 7 | -5
2 |


3. bring the first coeff. straight down

_1 | 7 | -5
2 |
_1 |


4. multiply the 2 by the number that you brought down, then put the product directly below the next coeff. then addthe product from the coeff and bring that number straight down.

_1 | 7 | -5
2 | 2 |
_1 | 9 |

then repeat for the 9

_1 | 7 | -5
2 | 2 | 18
_1 | 9 | 13


finally put the all of the bottom numbers next to an X starting with the highest degree - 1 (X2 turns into X) and the last number is the remainder

you should now have:

X + 9
----------- or X+9 with a remainder of 13
13


sorry darkstar but i think you almost had it
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#16
^ Oh, my bad. - (-13) is positive. You are right sir, I concede. My work on the second problem is right though.
Quote by denizenz
I'll logic you right in the thyroid.

Art & Lutherie
#17
yes. I must agree.

"Astounding work super math team!"


now, off to bed for me!
If you can play music with enthusiasm and an honest effort, then no matter how flawed, noisy and unclean the music is, you are a musician. If you play just to be the best, you are not a musician, nor are you worthy of any musician's recognition. - me
#18
Darkstar

one more thing?

on the X-3 x 3X

did you use FOIL to get the 9x?
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#19
No man, it's multiplying a single term with two terms, so you just distribute. Example:

a(b+c) = ab + ac

3x (x - 3) = 3x(x) + 3x(-3)
= 3x^ - 9x
Quote by denizenz
I'll logic you right in the thyroid.

Art & Lutherie
#20
Quote by darkstar2466
No man, it's multiplying a single term with two terms, so you just distribute. Example:

a(b+c) = ab + ac

3x (x - 3) = 3x(x) + 3x(-3)
= 3x^ - 9x



Alright thanks,

I understand it when its taught to me but I can't apply it.


EDIT:

So

2x^2+3x-1

X+4

= 2x +11 + (4/X+4)


?
If so then I've got it
And we will weave in and out of sanity unnoticed
Swirling in blissfully restless visions of all our bleary progress
Glowing in radiant madness
Last edited by TDKshorty at Nov 9, 2007,