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anonymous

  • one year ago

Solve for x: 3 over 4 x + 5 over 8 = 4x

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  1. welshfella
    • one year ago
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    |dw:1437764425692:dw|

  2. welshfella
    • one year ago
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    multuply through by the LCM 8x

  3. Haseeb96
    • one year ago
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    |dw:1437764448811:dw|

  4. welshfella
    • one year ago
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    |dw:1437764496079:dw|

  5. anonymous
    • one year ago
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    |dw:1437732201178:dw|

  6. welshfella
    • one year ago
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    you now need to solve the quadratic equation 32x^2 - 5x - 6 = 0

  7. anonymous
    • one year ago
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    have no idea how to

  8. welshfella
    • one year ago
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    ok you need to use the quadratic formula x = [ -b +/- sqrt(b^2 - 4ac)] / 2a where a , b and c are the coefficients in the equation ax^2 + bx + c = 0

  9. welshfella
    • one year ago
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    so in our case we have a = 32, b = -5 and c = -6

  10. welshfella
    • one year ago
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    plug these into the formula to find the values of x

  11. welshfella
    • one year ago
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    so we have x = [-(-5) +/- sqrt(25 - 4*32*-6)] / 64

  12. welshfella
    • one year ago
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    work that out on ur calculator.

  13. welshfella
    • one year ago
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    there are 2 roots - one using the - and one using the +

  14. anonymous
    • one year ago
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    am i solving whats in parenthesis ?

  15. welshfella
    • one year ago
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    work out the parentheses first

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