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marcfranzblau

  • 4 years ago

Solve. (2x^2) - 8x -14 = 0 1) x= 4± 3 √2 2) x= 2± 2 √7 3) x= 4± √3 4) x= 2 ± √11

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  1. 101Ryan101
    • 4 years ago
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    judging by the answers I guess you could use the quadratic equation.

  2. 101Ryan101
    • 4 years ago
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    wait.. ha ha.. divide the whole thing by 2

  3. 101Ryan101
    • 4 years ago
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    and it'll be x^2 - 4x -7

  4. marcfranzblau
    • 4 years ago
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    so could you tell me which is the best possible answer? i have no clue

  5. 101Ryan101
    • 4 years ago
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    The one that is the correct answer. :p

  6. 101Ryan101
    • 4 years ago
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    you have to use the quadratic formula... what you have is... x^2 - 4x -7 and the quadratic formula is...

  7. 101Ryan101
    • 4 years ago
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  8. 101Ryan101
    • 4 years ago
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    ax^2 + bx + c is the form we have... (1)x^2 - 4x -7 where a =1 b = (-4) c = (-7)

  9. 101Ryan101
    • 4 years ago
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    plug a,b, and c into the quadratic equation to solve for the roots of x.. these are the points on the graph where this function crosses the x axis...

  10. marcfranzblau
    • 4 years ago
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    im trying i suck at this

  11. marcfranzblau
    • 4 years ago
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    You cant just help out a pal? one question ):

  12. marcfranzblau
    • 4 years ago
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    i got 4±√44 / 2 so far

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spraguer (Moderator)
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