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kiara23

  • 3 years ago

Solve. 14x2 + 42x + 70 = 0

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  1. moneybird
    • 3 years ago
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    factor out the 7 first

  2. mark_o.
    • 3 years ago
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    divide them with 14

  3. mark_o.
    • 3 years ago
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    14x^2/14 + 42x/14 + 70/14 = 0/14

  4. mark_o.
    • 3 years ago
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    x^2 + 3x + 5 = 0 then try solving for x

  5. mark_o.
    • 3 years ago
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    use quadratic formula \[x=[-b-+\sqrt{(b^2 -4ac)}/2a\], here you a=1,b=3,c=5 try them

  6. mark_o.
    • 3 years ago
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    youl get an answer of x=-1.5+1.66i and x=-1.5-1.66i ans...

  7. mark_o.
    • 3 years ago
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    remember that \[\sqrt{-1}=i\]

  8. mark_o.
    • 3 years ago
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    let me know if you hve question

  9. kiara23
    • 3 years ago
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    im def. lost math is not my strongest subject. i just cant get it

  10. mark_o.
    • 3 years ago
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    it just takes practise.....

  11. mark_o.
    • 3 years ago
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    do this one til you get the answer

  12. mark_o.
    • 3 years ago
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    you already know how to use the quadraic formula right?

  13. kiara23
    • 3 years ago
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    a little but not really

  14. mark_o.
    • 3 years ago
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    ok try that till u get the answer

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