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# Roots and Exponents

### Essential Vocabulary for Unit 2

Term | Definition |
---|---|

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