can anyone tell me when should the sign +- be use?

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can anyone tell me when should the sign +- be use?

2007-02-13 20:29:41 · 3 answers · asked by sochn9022jkl 1 in Science & Mathematics ➔ Mathematics

3 answers

Maybe it is the expression of the expected accuracy of a measurement and can also be written as +/- (hard to type, isn't it). To be absolutely correct, it represents the standard deviation of a normal distribution of errors. The last is a fine point that only mathematicians and engineers really care about.

2007-02-13 20:34:22 · answer #1 · answered by ZORCH 6 · 0⤊ 0⤋

To express an even-numbered root, as in sqrt(100) = +/- 10, and also to show the limits of accuracy of a measurement or calculation, as in 59 cm +/- 0.3.

2007-02-14 04:52:07 · answer #2 · answered by hznfrst 6 · 0⤊ 0⤋

when your doing a maths problem

2007-02-14 04:35:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋