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Old 2014-07-11, 22:56   #2
diep
 
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Sep 2006
The Netherlands

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>> -x^2 + 0.555^2 = - x^2 - 0.8x +0.84 + 0.195^2 +- 0.195 sqrt(-x^2 -0.8x + 0.84)

checking now whether that would be

-x^2 + 0.555^2 = - x^2 - 0.8x +0.84 + 0.195^2 +- 2 * 0.195 sqrt(-x^2 -0.8x + 0.84)

and what the result is then...
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