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The plus sign (+) and the minus sign (−) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition , which results in a sum , while − represents subtraction , resulting in a difference . [ 1 ]
The plus and minus symbols are used to show the sign of a number. In mathematics, the sign of a real number is its property of being either positive, negative, or 0.Depending on local conventions, zero may be considered as having its own unique sign, having no sign, or having both positive and negative sign.
Positive signs make up the fire and air triplicities. [19] [20] Negative polarity signs, also called passive, yin, receptive, or feminine signs, [19] are the six even-numbered signs of the zodiac: Taurus, Cancer, Virgo, Scorpio, Capricorn, and Pisces. Negative signs make up the earth and water triplicities. [20]
The plus–minus sign or plus-or-minus sign (±) and the complementary minus-or-plus sign (∓) are symbols with broadly similar multiple meanings. In mathematics , the ± sign generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction .
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if a is positive, then the sign of a × b is the same as the sign of b, and; if a is negative, then the sign of a × b is the opposite of the sign of b. The justification for why the product of two negative numbers is a positive number can be observed in the analysis of complex numbers.
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