Thoughts on Why (–1)(–1) = +1

  • Thoughts on Why (–1)(–1) = +1

    Tina Rapke
    Consider why (–1)(–1) = +1 and how and why a teacher might go about explaining this concept to high school students without using pseudoreasoning. Also a precise explanation, through the use of the distributive property, as to why (–1)(–1) = +1.