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miah

  • 3 years ago

Solve. 3x2 – 7x – 2 = 0

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  1. jhonyy9
    • 3 years ago
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    do you know how you can solving a quadratic ?

  2. jhonyy9
    • 3 years ago
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    us formula of discriminant

  3. jhonyy9
    • 3 years ago
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    D = b^2 -4ac

  4. jhonyy9
    • 3 years ago
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    so you dont know it how ?

  5. miah
    • 3 years ago
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    no

  6. shreya.
    • 3 years ago
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    \[3x^{2}-7x-2=0\] Use the formula that jhonyy9 gave to calculate the Discriminant \[D=b^{2}-4ac\] now use the quadratic formula which is \[\frac{ -b \pm \sqrt{D} }{ 2a }\] where a=3 b=-7 and c=-2

  7. miah
    • 3 years ago
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    uhm ?

  8. shreya.
    • 3 years ago
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    we use these formula's to solve the quadratic equations - \[ax^{2}+bx+c=0\]

  9. miah
    • 3 years ago
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    I have no idea how to do it

  10. shreya.
    • 3 years ago
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    \[x=\frac{-b \pm \sqrt{D} }{ 2a }\]

  11. shreya.
    • 3 years ago
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    just put the values. first to calculate D and then in the above formula.

  12. miah
    • 3 years ago
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    is the answer \[x=\frac{ 7\pm \sqrt{73} }{ 6 }\]

  13. shreya.
    • 3 years ago
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    yes :-) ..!!

  14. miah
    • 3 years ago
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    yayy

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