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Depends on the country. In Poland it's usually nothing for multiplication: (x+3)(10-y) then dot, then asterisk. Nobody writes "x" for scalar multiplicatio
by ajuc 5y ago
Depends on the country. In Poland it's usually nothing for multiplication:
(x+3)(10-y)
then dot, then asterisk. Nobody writes "x" for scalar multiplication cause it's easy to mistake it for the variable x. What do you mean by 2xy? 2 * y or 2 * x * y?
Another cultural difference is how 7 and 1 is written - in USA you write 7 with 2 strokes and 1 with 1 stroke. In my country 7 is always crossed (always has 3 strokes) and 1 has 2 strokes.
And variable z is usually crossed in equations to distinguish it from 2 (but that varies regionally).
- fratajcz 5y agoIn this case, most people will write the variable x with curved ends (𝑥) and the operator with straight ends.
- leephillips 5y agoThat was how I learned to notate multiplication in high school or earlier. It’s how it’s done in all the mathematical literature or textbooks I’ve ever seen. And people only started using * when they started programming computers.
- ajuc 5y agoYou might be surprised then that we don't even use . as a decimal point :)