Question

can anyone help me with complex fractions?

Answer 1

Yes.

Answer 2

okay should i give you the problems I have? I have three problems to do tonight.

Answer 3

Yes.

Answer 4

you can always keep them to yourself and make us guess ;)

Answer 5

In most of the cases all you have to do is use the third binomial formula for the denominator to make it real and then separate real and imaginary part in the numerator

Answer 6

hahaha :) well i just joined this site so i didn't know if people are willing to do my math problems if i post them. thank you nowhereman..but these problems are a few i have left over that ive been attempting to do so many times and failing horribly. so i figure this is my best bet. here is the first question

Answer 7

4/81-1/x^2
-------------
1/9+1/x
(the dotted line separates the num from denom

Answer 8

z=5

Answer 9

?

Answer 10

z?

Answer 11

Are you sure it's a 4? because then you can only expand it by 81x^2 and not really simlify it much

Answer 12

complex means something else in math terms :)

Answer 13

get 81x^2 as common denoms

Answer 14

4x^2-81
---------
2x^2+81x

Answer 15

you mean 9 instead of 2, don't you?

Answer 16

2x^2(9) ...yeah lol

Answer 17

(2x-9)(2x+9)
-------------
9x(x+9)

Answer 18

yes! thank you so much! i have two more for you =]

Answer 19

is that correct? lol

Answer 20

YES it is correct you awesome awesome person

Answer 21

nowhere helped ;)

Answer 22

yes, thanks to both of you!

Answer 23

he like my jiminy cricket; ..do this, do that; why do i bother lol

Answer 24

x/7 - 7/x
---------
4/7 - 4/x

Answer 25

7x as commons

Answer 26

hahaha you are silly. that's a great analogy. does he follow what you say to other people often, correcting what you say?

Answer 27

they all do; they point out all my flaws in a vain attenpt to keep me humble ;)

Answer 28

hehehe keeps you in check

Answer 29

x^2 - 49
-------
4x - 28



(x+7)(x-7)
--------- = (x+7)/4
4(x - 7)

Answer 30

that is what i got :)
thank you

Answer 31

(16/x-3) + 8
-------------
(10/x-3) +5

Answer 32

is that x-3 all inthe denominator?

Answer 33

both of the x-3s are in each of the denominators. the +8 and +5 are not. does that make sense?

Answer 34

multiply numerator and denominator by the factor x-3

Answer 35

16+8(x-3)
------------
10+5(x-3)

Answer 36

(x-3) for common denoms then:

16/(x-3) + 8
-------------
10/(x-3) +5


16 + 8x - 24
-------------
10 +5x - 15


8x - 8
------
5x - 5


8(x - 1)
------- = 8/5
5(x - 1)

Answer 37

16+8x-24
---------
10+5x-15

Answer 38

so those x-1's cancel out ?

Answer 39

yes right :)

Answer 40

its either that or we use them for beef stew stock lol

Answer 41

lol you're fricken hilarious dude. thanks you guys! i can sleep peacefully now!