Quadratic Equation: how to solve -0.2x^2 + 12x + 11 = 0

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
kwikkarl65
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Quadratic Equation: how to solve -0.2x^2 + 12x + 11 = 0

Postby kwikkarl65 » Sun Aug 22, 2010 2:47 am

How do you solve the quadratic equation:

-0.2x^2 + 12x + 11 = 0

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stapel_eliz
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Postby stapel_eliz » Sun Aug 22, 2010 11:31 am

kwikkarl65 wrote:How do you solve the quadratic equation:

-0.2x^2 + 12x + 11 = 0

To learn how to solve quadratics in general, try here.

A good first step for this particular quadratic might be to multiply through by -5, to remove the decimal and swap the signs to the standard formatting. :wink:

kwikkarl65
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Re: Quadratic Equation: how to solve -0.2x^2 + 12x + 11 = 0

Postby kwikkarl65 » Sun Aug 22, 2010 5:22 pm

Thank you. multiplying by -5 helped a lot and got me on the right track.


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