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7 votes
7 votes
Seven less than a number squared (im working on translating)

User Arnoldbird
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1 Answer

20 votes
20 votes

A letter or any other symbol may be used to represent an arbitrary number. For example, let's use the letter M. Since M equals "a number", then, "a squared number" may be represented as:


M^2

Seven less than a number squared, is the number squared minus 7, so:


M^2-7

is a correct representation of "seven less than a number squared".