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sgta101

  • one year ago

Question in comments...plz help

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  1. Hawk3ye
    • one year ago
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    Ok.

  2. sgta101
    • one year ago
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    \[a^4-29a^2+100<0\]

  3. sgta101
    • one year ago
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    i really need an explanation or showing of work.

  4. Hawk3ye
    • one year ago
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    Holy chiznets. What type of math is this. Geometry, Triginometry, Calculus, Algebra, etc.

  5. sgta101
    • one year ago
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    Algebra

  6. Hawk3ye
    • one year ago
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    1 or 2

  7. sgta101
    • one year ago
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    2

  8. sgta101
    • one year ago
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    quadratic inequalities

  9. Hawk3ye
    • one year ago
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    Can't help you their. I'm just getting out of Geometry. I take Algebra II starting Tuesday. Sorry laddy.

  10. sgta101
    • one year ago
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    it's okay, thanks for trying

  11. Hawk3ye
    • one year ago
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    I aced Algebra I though I know that much. In my day we didn't have all this fancy schmancy stuff(I'm only 14). I don't know nuttn bout dis der Aljero!

  12. Hawk3ye
    • one year ago
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    I gotta kick outta that

  13. sgta101
    • one year ago
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    im 14 also...

  14. sgta101
    • one year ago
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    i need to find the solution set of the inequality.

  15. Hawk3ye
    • one year ago
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    Will you give me a medal for trying?? :DD

  16. sgta101
    • one year ago
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    Maybe...

  17. RolyPoly
    • one year ago
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    Can you please solve the quadratic equation first? I mean to find that value of a when the equation is 0

  18. Hawk3ye
    • one year ago
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    Tehehe.

  19. sgta101
    • one year ago
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    ya im pretty sure it's \[a^2-5a-2a+10\] After it's been factored it's \[(a-5)(a-2)(a-5)(a-2)\]

  20. RolyPoly
    • one year ago
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    Not quite..

  21. RolyPoly
    • one year ago
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    No repeated factors in this case.

  22. sgta101
    • one year ago
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    so just \[(a−5)(a−2)\] ?

  23. RolyPoly
    • one year ago
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    There are four factors :)

  24. sgta101
    • one year ago
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    so \[(a−5)(a−2)(a+5)(a+2)\] ?

  25. RolyPoly
    • one year ago
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    Bingo!

  26. RolyPoly
    • one year ago
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    |dw:1358566081932:dw| So, the graph is like this (sorry for my poor drawing..) In what region does the function have a value less than 0?

  27. RolyPoly
    • one year ago
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    *regions

  28. sgta101
    • one year ago
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    i think i got it from here. one more thing does \[(a^2-5a-2a+10)^2\] become \[(a^2-7a+10)(a^2-7a+10)\]?

  29. RolyPoly
    • one year ago
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    Are you still working on the factorization part?

  30. sgta101
    • one year ago
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    ya im making sure how i got the wrong answer.

  31. sgta101
    • one year ago
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    i think i messed up in the factorization

  32. RolyPoly
    • one year ago
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    \[a^4 - 29a^2 +100\]\[=a^4 - 25a^2 - 4a^2 +100\]\[=a^2 (a^2-25) -4(a^2 - 25)\]\[=(a^2-4)(a^2-25)\]\[=(a-2)(a+2)(a^2-25)\]\[=(a-2)(a+2)(a-5)(a+5)\] The last two steps are just using the identity of difference of two squares. \(a^2-b^2 = (a+b)(a-b)\)

  33. RolyPoly
    • one year ago
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    I don't know how you get this: \[(a^2-5a-2a+10)^2\]

  34. sgta101
    • one year ago
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    Thanks so much for this. :D

  35. RolyPoly
    • one year ago
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    You're welcome :)

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