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4*x^3-5*2^x-3*x-18=0 equation

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Numerical solution:

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The solution

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   3      x               
4*x  - 5*2  - 3*x - 18 = 0
$$\left(- 3 x + \left(- 5 \cdot 2^{x} + 4 x^{3}\right)\right) - 18 = 0$$
Numerical answer [src]
x1 = 9.31705584956028
x2 = 2.31950169786005
x2 = 2.31950169786005