## EXPONENTS

An exponent is another neat notation. Suppose I want to multiply an expression by itself (called “squaring” the expression):

(j + 7)0 + 7) = (j + 7)2.

The little “2” placed high up in the upper right means “square the expression” or more directly, “write the expression down twice, making it clear that you mean multiplication.” This is also sometimes called “raising the expression to the power of 2. ”

Similarly, I can “cube” the expression

(j + 7)0 + 7)0 + 7) = (j + 7)3

and so on.

In general, (anything)" is called raising the expression “anything” to the nth power.

The following discussion of exponents is not needed in order to understand the book; I just thought that some readers might be curious as to why raising an expression to the power of 2 is called “squa...

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