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anonymous

  • one year ago

Using the quadratic formula to solve 11^2 – 4x = 1, what are the values of x?

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  1. anonymous
    • one year ago
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    Make the equation equal to 0 first.

  2. anonymous
    • one year ago
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    @dreamstoogood could you double check the equation? thanks

  3. anonymous
    • one year ago
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    A. \[\frac{ 2 }{ 11 }\pm \frac{ \sqrt{15} }{ 11}\] B. \[\frac{ 2 }{ 11 } \pm \frac{ 2\sqrt{15} }{ 11}\] C.\[\frac{ 2 }{ 11}\pm \frac{ \sqrt{7} }{ 11 }\] D.\[\frac{ 2 }{ 11 }\pm \frac{ \sqrt{7}i }{ 11 }\]

  4. anonymous
    • one year ago
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    I assume that's 11x^2-4x=1|dw:1437974848344:dw|

  5. anonymous
    • one year ago
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    its 11x^2 *** im so sorry!

  6. anonymous
    • one year ago
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    Just plug the numbers in the formula, then you're good.

  7. anonymous
    • one year ago
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    if i plug in B, since its already negative does it stay negative

  8. anonymous
    • one year ago
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    No, it'll be positive.

  9. anonymous
    • one year ago
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    4 \[\frac{ 4\pm \sqrt{33} }{ 22 }\]

  10. anonymous
    • one year ago
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    what i have

  11. anonymous
    • one year ago
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    You sure you did it correct?

  12. anonymous
    • one year ago
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    4+33=37 4-33=-29 and no im not sure at all lol. I tried plugging it in. But i was never good at quadratic formula :\

  13. triciaal
    • one year ago
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    |dw:1437976158030:dw||dw:1437976354357:dw|

  14. triciaal
    • one year ago
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    or you can review what I just did with the quadratic formula

  15. anonymous
    • one year ago
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    Thank you! I will put it in the website rn. I dont have a graphing calculator so ive been using online calculators. & its okay! Also thank you @triciaal ! how did you end up getting 11 from 22? just divide by 2?

  16. triciaal
    • one year ago
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    |dw:1437976823333:dw|

  17. triciaal
    • one year ago
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    yes 60 = 4* 15 so |dw:1437976967666:dw|

  18. triciaal
    • one year ago
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    laughing

  19. triciaal
    • one year ago
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    I am so old we did not even have graphing calculators

  20. triciaal
    • one year ago
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    you are welcome

  21. anonymous
    • one year ago
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    I am pretty sure x = 30

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