does anyone wan't to help me on my math? #polynomial expressions :(

- anonymous

does anyone wan't to help me on my math? #polynomial expressions :(

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- anonymous

need help?

- anonymous

yes pleaseeeee :D

- anonymous

ok... shoot.

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## More answers

- anonymous

what's the problem?

- anonymous

It is
p4t-3 over
r-2

- anonymous

|dw:1332894399534:dw|
is this what you mean?

- anonymous

i did not know you could draw on this o.o but yes :D

- anonymous

yes... press that pencil looking thing to modify that drawing. use your mouse to "draw".

- anonymous

isn't technology great? :)

- anonymous

Alright and yes yes it is :)

- anonymous

|dw:1332894692390:dw|

- anonymous

ok. what do you want done with this? (what is the instruction on the textbook problem?)

- anonymous

it says to simplify

- anonymous

hmm. do they give any values for p, t, r ?
because this expression is simplified already.

- anonymous

does the book say to replace p, t, r with certain values then simplify?

- anonymous

nope all it says is to assume the denominator equals zero

- anonymous

assume the denominator = 0 ? the denominator here is r-2. so if r-2=0 that means r=2.
I don't know why the textbooks says "assume the denominator = 0". But if that's the case, then this expression does not make any sense... a zero in the denominator means you're dividing by 0. If you take a calculator and ask it to divide by zero, it will give you an error message.

- anonymous

can you state what textbook this is, what chapter title this problem is from, and I'll see if I can google it.

- anonymous

or how about this... can you give another problem from that same section?

- anonymous

Glencoe Mcgraw-Hill Algebra 1lesson 7-2 pg.413 19-42

- anonymous

|dw:1332895666714:dw|

- anonymous

ok. that first problem is already simplified (check to see if it is written down correctly). but this problem can be simplified.
do you want to work on this one?

- anonymous

yes :)

- anonymous

simplifying expresions is very much like reducing fractions..
like this|dw:1332896144967:dw|
you understand what happened here?

- anonymous

cross out everything that is COMMON on both the numerator and denominator.

- anonymous

where did you get the 12 from?

- anonymous

it's not 12. I cancelled the common factor of 2 from both top and bottom then put a 1 in their place.

- anonymous

ohhhh so where's the 6 over 8 from? sorry i'm really bad at math :(

- anonymous

this is just an example. we're going to use these same steps to simplify your problem.

- anonymous

ohhhh okay

- anonymous

so in your problem,
|dw:1332896790245:dw|

- anonymous

do you see that all i did was to write c^2 as c*c, d^5 as d*d*d*d*d, etc...?

- anonymous

yes

- anonymous

now we cancell all common factors from the top and bottom and replace with a 1...
like this.|dw:1332897084525:dw|

- anonymous

ohhhhhhh i get it now thank you so much :D

- anonymous

wait, almost done...

- anonymous

I KNEW IT lol sorry but yeah keep going :D

- anonymous

|dw:1332897378190:dw|
anything raised to the zero power is 1.

- anonymous

you can verify that on your calculator.... so your answer is
|dw:1332897466842:dw|
now we're done....

- anonymous

later on, you'll probably figure out different ways of simplifying. my teacher made us do it this way until we could actually figure out the patterns. shortcuts will make this much easier. trust me...
good luck!!! :)

- anonymous

NOW THANK YOU SO MUCH :D you are the bestttt

- anonymous

yw

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