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# Roots and Exponents

### Essential Vocabulary for Unit 2

TermDefinition
Variable a symbol (usually a letter) used to represent an unknown number
Base (of a power) the (big) number used in repeated multiplication/division
Exponent the (small) number that tells us how many times to use the base in multiplication/division
Square of a Number when you multiply that number by itself
Square Root of a Number a number that, when used in multiplication two times, gives that number
Cube of a number when you multiply that number by itself three times
Cube Root of a Number a number that, when used in multiplication three times, gives that number
± tells you one value is positive and one value is negative (example: ±3 = 3 and -3
Simplify to do all possible operations (Parenthesis, Exponents, Multiply and Divide, Add and Subtract)
Expression a mathematical phrase that can contain numbers, variables, and operations
Power refers to the exponent; (also) refers to a base number and its exponent
Exponential Numbers numbers that contain exponents
Scientific Notation a way to write very small or very large numbers
Rational Numbers numbers that can be written as a fraction
Irrational Numbers numbers that cannot be written as fractions
Created by: cbaumler