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Errors and Uncertainties in Computations Errors and Uncertainties ...

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Exercise: Subtractive Cancellation<br />

1. Equivalent solutions to<br />

ax 2 + bx + c =0<br />

x 1,2 = −b ± √ b 2 − 4ac<br />

, x 0 1,2 =<br />

2a<br />

−2c<br />

b ± √ b 2 − 4ac .<br />

Subtractive cancellation if 4ac

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