Question

how do u simplify (x-3)/(4x^2) - (2x+2)/(9x) + (7x)/24

Answer 1

aparently by getting someone else to do it for you lol ;)

Answer 2

i know

Answer 3

get like denominators and drudge thru it.... its dirty work but build character :)

Answer 4

i need some steps to do the work. do know how to do it

Answer 5

(x-3)/(4x^2) - (2x+2)/(9x) + (7x)/24...i do

Answer 6

can u hlp me

Answer 7

x-3 2x+2 7x
---- - ----- + --- lets start buy re writing the numbers...
4x^2 9x 24

Answer 8

ok

Answer 9

we need to simply mulitply everything in the bootom to get a common denom right?

4x^2( 9x)( 24) = 864x^3 correct?

Answer 10

yes

Answer 11

now just multiply everything by that number really; or rather it might be easier to see what happens when we leave it in its factored form of:

(4x^2)(9x)(24)

(x-3) * (4x^2)(9x)(24)
------------------- = ?
(4x^2)

(x-3)(9x)(24) right?

which equals 216x^2 - 648x

Answer 12

(2x+2) * (4x^2)(9x)(24)
---------------------
(9x)


which equals 192x3 +192x^2 right?

Answer 13

7x (4x^2)(9x)(24)
---------------
(24)


7x (4x^2)(9x) = 252x^3

Answer 14

now lets put it all together

192x^3 +192x^2
252x^3 +216x^2 - 648x
-----------------------
444x^3 + 408x^2 - 648x; maybe wanna factor that ...and see if i did any errors

Answer 15

no their r no errors

Answer 16

444x^3 408x^2 648x
------- + ------- - ------- is gonna be our answer i think
864x^3 864x^3 864x^3

Answer 17

i think we can do that with an easier number tho; we dint use the "least" common denomintor.....just a common one

Answer 18

I'm starding to understand it now. I have another question do u know how to find the conic section of 3y^2+9x-8y=13

Answer 19

yes; its a parabola

Answer 20

3y^2 -8y = 13- 9x

complete the square on the y side...

Answer 21

how do u know

Answer 22

its only got one ^2 part to it; so it bends only once

Answer 23

the rest of it is just filler to make it bend how and where you want it

Answer 24

Oh, thanks 4 the help

Answer 25

youre welcome :)