Multiplication of variables

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User offline. Last seen 11 years 17 weeks ago. Offline
Joined: 08/11/2010

The multiplication sign is removed when it involves variables, but when you put in values for the variables, it doesn't get put back in, as it would if you were writing on paper.

When you put the values 1 and 2 into 4 a c (part of the quadratic theorem), you get 4 1 2, rather than 4·1·2.

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