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9^x-2*6^x+2*4^x-2*2^x+1=0 equation

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Numerical solution:

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The solution

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 x      x      x      x        
9  - 2*6  + 2*4  - 2*2  + 1 = 0
$$\left(- 2 \cdot 2^{x} + \left(2 \cdot 4^{x} + \left(- 2 \cdot 6^{x} + 9^{x}\right)\right)\right) + 1 = 0$$
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Numerical answer [src]
x1 = 5.22499747014899e-7
x2 = 0.0
x2 = 0.0