Sunday, November 8, 2015

#6

This week we graphed polynomials. Now I  know what a degree is and how to graph "easy" polynomials. But I don't understand these formulas:
  1. a2−b2 =a2 −2ab+b2; a2 +b2 =(a−b)2 +2ab 
    a3 −b3 =(a−b)(a2 +ab+b2)
    a3 +b3 =(a+b)(a2 −ab+b2) 

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