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itsjustme_lol

x intercepts

  • one year ago
  • one year ago

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  1. RainbowsandCats
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    whats the question your asking

    • one year ago
  2. itsjustme_lol
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    identify the x-intercepts in the graph y = 3x2 + 19x – 40..sorry connection was slow

    • one year ago
  3. ChmE
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    The Def'n of the x-intercept is the points where the y-value is zero. So set y to 0 and solve for x

    • one year ago
  4. precal
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    use the quadratic formula

    • one year ago
  5. jennychan12
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    quadratic formula: \[x = \frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]

    • one year ago
  6. ChmE
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    Quadratic formula for 0 = ax^2 + bx + c\[x= {-b \pm \sqrt{b^2-4ac} \over 2a}\]

    • one year ago
  7. itsjustme_lol
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    thank you guys.. but how do I do that?

    • one year ago
  8. precal
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    are you studying algebra 1 or 2?

    • one year ago
  9. itsjustme_lol
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    2

    • one year ago
  10. precal
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    |dw:1357172313426:dw|just sub into formula and use order of operation to evaluate it

    • one year ago
  11. ChmE
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    This can also be factored if you are well versed at factoring

    • one year ago
  12. precal
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    you could also, find the roots by looking at the graph of the function

    • one year ago
  13. itsjustme_lol
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    thankyou precal. (:

    • one year ago
  14. ChmE
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    \[0=3x^2 + 19x – 40\]\[0=(3x-5)(x+8)\]

    • one year ago
  15. precal
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    you have many choices for finding the solution, if you plan to study math beyond algebra 2 learn to factor (but not everything can be factored), learn to use the quadratic formula (works 100% of the time)

    • one year ago
  16. itsjustme_lol
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    im horrible in math, so after alg 2 i will be done with it :P

    • one year ago
  17. precal
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    everything in math (no matter the power) gets written to the 1st power or the 2nd power, so learn to solve those

    • one year ago
  18. precal
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    what will you do in the future? future goals?

    • one year ago
  19. precal
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    |dw:1357172585393:dw|

    • one year ago
  20. itsjustme_lol
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    im going to own a buisness but i already everything i would need too know. its not going to be huge or complex..just a simple small town business

    • one year ago
  21. precal
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    |dw:1357172654731:dw|

    • one year ago
  22. precal
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    |dw:1357172718818:dw|

    • one year ago
  23. precal
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    well math teaches us to be patient and to pay attention to details

    • one year ago
  24. precal
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    in business, you will care about maximizing your profit and minimizing your cost all big businesses started small and grew higher math helps you expand your business watch shark tank, pay attention to when they talk about numbers many people do not get funding because they do not know their numbers some good ideas were passed up by the sharks some bad ideas were given money because the people knew their numbers good luck don't give up on math yet

    • one year ago
  25. itsjustme_lol
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    im givin different answers on this question. im confused which one is wrong or right?

    • one year ago
  26. precal
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    Solutions are the same x=-8 and x=5/3 I just showed that if you use the quadratic formula or factoring, you will get the same solutions.

    • one year ago
  27. itsjustme_lol
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    I wont give up on math, i mean as I have to use it ill start to learn it..in real life situations i guess. and ooohhkk. thankyou (:

    • one year ago
  28. precal
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    yw

    • one year ago
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