**Review of Algebra**

**Integers**

{ …, *−*4, *−*3, *−*2, *−*1, 0, 1, 2, 3, 4, …}

**Positive Integers (Natural Numbers)**

{1, 2, 3, 4, 5, …}

**Nonnegative Integers (Whole Numbers)**

{0, 1, 2, 3, 4, 5, …}

**Rational Numbers**

A rational number is a number of the form *p/q*, where *p* and *q* ≠ 0 are integers.

**Irrational Numbers**

An irrational number is a number that cannot be written in the form *p/q*, where *p* and *q* ≠ 0 are integers.

**Real Numbers**

The set *R* of real numbers is the union of the sets of rational and irrational numbers.

**Laws of Exponents**

**Negative Exponent**

**Radical**

**Rational ...**

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