How could I show that (-m)(-n)= mn? The only thing I am allowed to use to prove this are the 5 basic mathematical axioms which allow for the commutative property and associative propery of the binary operations multiplication and addition;there exists an additive inverse for each integer, 1 is the multiplicative identity, and 0 is the additive identity, while mn=mp implies p=n where m is not equal to 0.(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Simple proof, just using the axioms

Loading...

Similar Threads for Simple proof using | Date |
---|---|

Simple Proof for the existence of eigenvector | Mar 21, 2014 |

Simple matrix algebra proofs | Feb 14, 2014 |

Simple Proof That Division By Zero Is Impossible | Sep 26, 2012 |

Simple Ab Alge proof | Mar 13, 2011 |

Simple Proof of Fermat's Last Theorem and Beal's Conjecture | Dec 30, 2010 |

**Physics Forums - The Fusion of Science and Community**