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anonymous

  • 5 years ago

Can someone help with with a question please? >Using Quadratic Formula and/or Substitution solve: ((t^2) -7) - 3((t^2) -7) + 2 = 0 (t^2) = T to the second power

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  1. amistre64
    • 5 years ago
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    expand the problem and see what it gets you

  2. anonymous
    • 5 years ago
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    heres what i got so far. : Using the quadratic formula: (Substitution) U = ((t^2) - 7) ==> u^2 - 3u + 2 ==> Quadratic Formula ==> 3 +- sqrt{9+8 ==> Answer that i got was : 3 (plus or minus) sqrt{ 17} divided by 2

  3. anonymous
    • 5 years ago
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    Is this correct?

  4. amistre64
    • 5 years ago
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    not according to the question you posted; is the original typoed?

  5. anonymous
    • 5 years ago
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    hmm shoot yes it is, im so sorry. its : ((t^2) - 7)^2 - 3((t^2) -7) + 2 = 0

  6. amistre64
    • 5 years ago
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    ok..... your quadratic formula has issues to it; you seem to have forgotten to /2a

  7. anonymous
    • 5 years ago
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    Um at the end of my answer i stated "Divided by 2"

  8. amistre64
    • 5 years ago
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    i see it; its was lost in the formating lol

  9. amistre64
    • 5 years ago
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    sqrt(b^2 -4(a)(c))...youve got a +4(a)(c)

  10. amistre64
    • 5 years ago
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    3 sqrt[9-8] --- +- -------- 2 2

  11. anonymous
    • 5 years ago
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    Wow, i cant believe i made that mistake.

  12. amistre64
    • 5 years ago
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    your answers should end up as : t^2 -7 = 1 and t^2 -7 = 2

  13. amistre64
    • 5 years ago
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    you slow typing ? :)

  14. anonymous
    • 5 years ago
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    May i ask, after the 3+- sqrt { 9-8} = 3+- sqrt {1} ----------- 2 so ==> it'd be 3+ 1 \2 || 3-1 \2?

  15. anonymous
    • 5 years ago
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    im at work sorry lol

  16. amistre64
    • 5 years ago
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    lucky you; i aint got a job ...

  17. amistre64
    • 5 years ago
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    yes; as long as i see it correctly; you did that right

  18. anonymous
    • 5 years ago
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    :D thanks for your help. And oh on that note, ill be unemployed by the end of this month. :( Work place is closing shop. ----- Quick confirmation: final answer = final answers = 2 and 1 correct?

  19. amistre64
    • 5 years ago
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    the final answer is to solve for t....not u :) final answers should be: +- 2sqrt(2) and +-3

  20. anonymous
    • 5 years ago
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    ah... if i may, how did you arrive at that?

  21. amistre64
    • 5 years ago
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    u = 1 = t^2-7 u=2=t^2-7 8=t^2 9=t^2 +-2sqrt(2) +-3

  22. anonymous
    • 5 years ago
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    :D thanks man. i get it (mostly :P) this sites awesome :) i think i might post here for help some other time

  23. amistre64
    • 5 years ago
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    :) good luck

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