How do you simplify this? 3  3x²  (x  1)(x  3) 3x² + 3  {switched top terms around} (x  1)(x  3) 3(x²  1)  {factored 3 out of top} (x  1)(x  3) 3(x + 1)(x  1)  {factored top into two binomials, it was a "difference of two squares"} (x  1)(x  3) 3(x + 1)  {cancelled x  1 on top and bottom} x  3  Algebra House
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