Prior to that, one used the word "negative" only in such expressions as "The product of two negative numbers is positive" and "Both solutions of this equation are negative".

NOTE: Multiplying by a negative is multiplying by a positive (signs still same) then multiplying by -1 (Signs now flipped). Dividing is multiplying by a fraction, and dividing by a negative number is …

Someone recently asked me why a negative $\\times$ a negative is positive, and why a negative $\\times$ a positive is negative, etc. I went ahead and gave them a proof by contradiction like this: As...

Feb 16, 2019 · Pupils get confused about the rules involving the $-$ sign partially because of this intentional mix-up by mathematicians and teachers (another, though related, source of confusion …

Both the negative sign symbol and subtraction's minus symbol look the same, so how does anyone tell them apart?

The word that you are looking for is the very word that you are using and that word is sign. If you are looking for something more "academic", then you can use its Latin variant, signum. Context can also …

Mar 5, 2016 · The negative sign essentially denotes the direction. You select a point and assume that all values on one side would be positive and all values on the other side would be negative. It all sounds …

May 29, 2015 · Does this mean that only the denominator of the fraction is negative? Do the above suggestions [look] right? Or how should I understand when in some examples the minus sign is …

Mar 13, 2011 · The whole idea of positive and negative is defined in terms of zero. Negative numbers are numbers that are smaller than zero, and positive numbers are numbers that are bigger than zero. …

Sep 25, 2021 · On the top, you are supposed to get $-\sqrt {4 +\frac {3} {x^2}}$ and plug in negative infinity. However, I don't get why you have to add the negative sign in front of the numerator, …