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4,096 = 4 x 4 x 4 x 4 x 4 x 4
x-2(x)+4/x^2 -4=x-2x+4/x^2 -4=-x-4+4/x^2
(x - 4)^3 = (x - 4)(x - 4)(x - 4)
x/4 - 4 = x/4 4x/4 - 4 x 4 = x x - 16 = x 0 = 16 There is no solution to the equation.
(x^2 - x - 12) = (x^2 - 4x + 3x -12) = x(x -4) + 3(x -4) = (x-3) x (x-4) Hence (x^2 - x - 12) divided by (x -4) is (x-3)