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itsjustme_lol

  • 2 years ago

x intercepts

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  1. RainbowsandCats
    • 2 years ago
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    whats the question your asking

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

  3. ChmE
    • 2 years ago
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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

  4. precal
    • 2 years ago
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    use the quadratic formula

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

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

  7. itsjustme_lol
    • 2 years ago
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    thank you guys.. but how do I do that?

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

  9. itsjustme_lol
    • 2 years ago
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    2

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

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

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

  13. itsjustme_lol
    • 2 years ago
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    thankyou precal. (:

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

  15. precal
    • 2 years ago
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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)

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

  17. precal
    • 2 years ago
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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

  18. precal
    • 2 years ago
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    what will you do in the future? future goals?

  19. precal
    • 2 years ago
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    |dw:1357172585393:dw|

  20. itsjustme_lol
    • 2 years ago
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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

  21. precal
    • 2 years ago
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    |dw:1357172654731:dw|

  22. precal
    • 2 years ago
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    |dw:1357172718818:dw|

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

  24. precal
    • 2 years ago
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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

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

  26. precal
    • 2 years ago
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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.

  27. itsjustme_lol
    • 2 years ago
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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 (:

  28. precal
    • 2 years ago
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    yw

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