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anonymous

  • 5 years ago

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

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  1. amistre64
    • 5 years ago
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    aparently by getting someone else to do it for you lol ;)

  2. anonymous
    • 5 years ago
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    i know

  3. amistre64
    • 5 years ago
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    get like denominators and drudge thru it.... its dirty work but build character :)

  4. anonymous
    • 5 years ago
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    i need some steps to do the work. do know how to do it

  5. amistre64
    • 5 years ago
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    (x-3)/(4x^2) - (2x+2)/(9x) + (7x)/24...i do

  6. anonymous
    • 5 years ago
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    can u hlp me

  7. amistre64
    • 5 years ago
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    x-3 2x+2 7x ---- - ----- + --- lets start buy re writing the numbers... 4x^2 9x 24

  8. anonymous
    • 5 years ago
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    ok

  9. amistre64
    • 5 years ago
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    we need to simply mulitply everything in the bootom to get a common denom right? 4x^2( 9x)( 24) = 864x^3 correct?

  10. anonymous
    • 5 years ago
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    yes

  11. amistre64
    • 5 years ago
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    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

  12. amistre64
    • 5 years ago
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    (2x+2) * (4x^2)(9x)(24) --------------------- (9x) which equals 192x3 +192x^2 right?

  13. amistre64
    • 5 years ago
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    7x (4x^2)(9x)(24) --------------- (24) 7x (4x^2)(9x) = 252x^3

  14. amistre64
    • 5 years ago
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    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

  15. anonymous
    • 5 years ago
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    no their r no errors

  16. amistre64
    • 5 years ago
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    444x^3 408x^2 648x ------- + ------- - ------- is gonna be our answer i think 864x^3 864x^3 864x^3

  17. amistre64
    • 5 years ago
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    i think we can do that with an easier number tho; we dint use the "least" common denomintor.....just a common one

  18. anonymous
    • 5 years ago
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    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

  19. amistre64
    • 5 years ago
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    yes; its a parabola

  20. amistre64
    • 5 years ago
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    3y^2 -8y = 13- 9x complete the square on the y side...

  21. anonymous
    • 5 years ago
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    how do u know

  22. amistre64
    • 5 years ago
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    its only got one ^2 part to it; so it bends only once

  23. amistre64
    • 5 years ago
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    the rest of it is just filler to make it bend how and where you want it

  24. anonymous
    • 5 years ago
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    Oh, thanks 4 the help

  25. amistre64
    • 5 years ago
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    youre welcome :)

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