3x2 = 81 b. (x - 1)(x + 1)-9 = 5x C. X - 9x + 10 = 32 d. 6x(x - 9) = 29
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We can rewrite this by subtracting the right side to get
... 3^(-x) -x^3 -x = 0
A graphing calculator shows this to have a solution near x=0.5.
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There are no algebraic means for solving such a combination of exponential and polynomial functions.
