Consider the equation (x â€“ 1)(x + 2) = 5(x â€“ 1).
First, solve this equation by dividing each side of the equation by x-1.
Second, solve the equation by first â€œFOILâ€ing the left side, then simplifying by bringing all terms to the left side of the equation, and then finally solve using factoring.
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- Why are the solutions to these two methods different? (Hint: Remember you cannot divide by zero)
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