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What item can be used to add and subtract?

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Anonymous

∙ 15y ago
Updated: 8/17/2019

The plus-minus sign (±) can be used to imply plus or minus within a sum. For example, one equation reads:

-b ± sqrt (b2 - 4ac)

This refers to an equation with two possible solutions - that from which you use the plus sign, and that from which you use the minus sign.

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Wiki User

∙ 15y ago
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