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Tresag

  • 3 years ago

use the quadratic formula to find any x-intercepts on the graph of the equation. y=x^2+2x-10

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  1. sasogeek
    • 3 years ago
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    what is the quadratic formula?

  2. Tresag
    • 3 years ago
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    I don't know

  3. Tresag
    • 3 years ago
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    ax^2+bx+c=0 ?

  4. sasogeek
    • 3 years ago
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    nope :P well the quadratic formula states that \(\huge x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \)

  5. sasogeek
    • 3 years ago
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    can you continue now that you have the formula?

  6. Tresag
    • 3 years ago
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    no

  7. sasogeek
    • 3 years ago
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    ok so if you have \(\huge ax^2+bx+c=0 \) substitute the values of a b and c into the formula and solve it.

  8. sasogeek
    • 3 years ago
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    are we okay now?

  9. Yahoo!
    • 3 years ago
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    To find x-intercepts put y =0 in y=x^2+2x-10

  10. Tresag
    • 3 years ago
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    no

  11. Yahoo!
    • 3 years ago
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    nw it is a quad eq....use Quadratic Formula..

  12. Tresag
    • 3 years ago
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    ok how do I do that ?

  13. sasogeek
    • 3 years ago
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    you have an equation similar to ax^2+bx+c=0 substitute the values into the quadratic formula i gave you, and solve it algebraically

  14. Tresag
    • 3 years ago
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    I don not know how to do that ???????

  15. sasogeek
    • 3 years ago
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    a=1 b=2 c=-10 replace that into the equation that into the formula

  16. sasogeek
    • 3 years ago
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    how are we doing?

  17. Tresag
    • 3 years ago
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    x^2+2x+-10=0

  18. sasogeek
    • 3 years ago
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    what about it?

  19. Tresag
    • 3 years ago
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    so now what do I do w/ it ?

  20. sasogeek
    • 3 years ago
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    i told you what a,b, and c are in that equation. a=1 b=2 c=-10 replace the values of a,b and c into the quadratic formula i gave you and solve it to find x

  21. sasogeek
    • 3 years ago
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    which part of that don't you understand? :/

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