Please simplify this question for a medal, i am stuck:
x+7 x^2-3x-40
---- - ---------
7x+35 x-8

- anonymous

Please simplify this question for a medal, i am stuck:
x+7 x^2-3x-40
---- - ---------
7x+35 x-8

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- schrodinger

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- anonymous

please show work

- anonymous

do you want help or an answer?

- anonymous

help

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## More answers

- anonymous

is it equal 0?

- anonymous

i don't know

- NotTim

first, get the denominators to be equal.

- NotTim

it may help you beforehand to get hte one on the upper right hand corner to be simplified, or whatever it is called.

- NotTim

also, I have thoughts along the same line with melinda. why are you here.

- anonymous

I will help you assuming it is equal 0
x+7/7x+35 - (x² -3x-40/x-8) = 0
multiply by (7x+35)(x-8)

- NotTim

Do that to the numerator.

- NotTim

for the denominators, just multiply it by the denominator of the other fraction.

- anonymous

are you following, rememberwhen2012?

- anonymous

yes

- anonymous

what would the denominators be if i multiply them?

- NotTim

i think you're smart enough to try that out. you do it first; we'll tell you how it worked out.

- anonymous

would the denominator be: 42x-8?

- NotTim

how did you get that?

- NotTim

and please dont try to frustrate us into giving you the answer. and please don't argue that. there are many users here like you.

- anonymous

?

- anonymous

take it easy, nottim. let's help her out

- NotTim

i dunno. im being a little upset with the users that i help nowadays.

- anonymous

me too, but we cant just generalize

- anonymous

can somone just show me the first step, then i might be able to finish the problem

- anonymous

rememberwhen2012, if you multiply both sides by (7x+35)(x-8), what you're gonna get?

- NotTim

and then show oyu the next step, all the the way to the answer.
why not.

- anonymous

7x^2-280

- anonymous

that has to be wrong

- anonymous

|dw:1333499804630:dw|

- anonymous

sorry I suck at drawing

- NotTim

good luck guys. i'm going.

- anonymous

now you can simplify (7x+35) with (7x+35)

- anonymous

and when multiplying (7x+35)(x-8) by x-7/7x+35 you get (x+7)(x-8)

- anonymous

are you following?

- anonymous

yes

- anonymous

what's next step?

- anonymous

woah whats the denominator?

- anonymous

(7x+35)(x-8)

- anonymous

let's do step by step

- anonymous

first term is

- anonymous

|dw:1333500231170:dw|

- anonymous

what do you get when u multiply those two terms?

- anonymous

now multiply that by (7x+35)(x-8)

- anonymous

thats the part i'm stuck on

- anonymous

|dw:1333500275916:dw|

- anonymous

see how we cancell them?

- anonymous

what's left is (x-8)(x+7)

- anonymous

understood?

- anonymous

yes i see, we can continue

- anonymous

now can you do the same with the next term?

- anonymous

we have x²-3x-40/x-8 times (7x+35)(x-8)

- anonymous

are you there?

- anonymous

okay

- anonymous

just tell me where you got stuck

- anonymous

you have to put effort into it, otherwise you won't be able to learn

- anonymous

okay i'm caught up to you, do i simplify the numerators now?

- anonymous

yes

- anonymous

think about it as

- anonymous

|dw:1333501411462:dw|

- anonymous

notice that we can cancell x-8

- anonymous

what's left?

- anonymous

the numerators

- anonymous

(7x+35)(x²-3x-40) right?

- anonymous

thats correct

- anonymous

what do you think is the next step?

- anonymous

simplify?

- anonymous

simplify what?

- anonymous

see, we have two terms now. what's the equation asking us to do?

- anonymous

subtract them, right?

- anonymous

take the first term we got and make it - the next term

- anonymous

oh

- anonymous

are you lost?

- anonymous

is the final answer-x^2+10x+75?

- anonymous

oops sorry for the delay, let me check

- anonymous

mmm it's not right

- anonymous

show your work

- anonymous

can you just tell me what you got?

- anonymous

I got -7x³-13x²+144x+1624=0

- anonymous

maybe it isn't equal 0 at all lol

- anonymous

i don't think it is lol

- anonymous

can you check your sheet and write the exercise exactly how it is?

- anonymous

yes

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