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Tag Archives | elementary algebra

Division by zero is undefined!

A rather confused discussion of this statement appeared recently on http://www.linkedin.com/groups?home=&gid=33207&trk=anet_ug_hm Here is my take on things: Division by zero is undefined whether you work with real numbers or complex numbers. Khan’s video on the subject is a bit confusing. The consistent exposition of algebra is given in Euler’s “Elements of algebra”.  There division is defined by saying that a/b=x, a unique […]

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Order of Operations in Elementary Algebra

I find rules such as GEMDAS or PEMDAS or BODMAS somewhat misleading. There is no reason to perform addition before subtraction or multiplication before division. I would use PEMA instead (operations in parentheses first, then Exponentiation and the associated inverse operation of extracting roots and taking logs, then somewhat easier operation of Multiplication and the […]

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