Solve for $x$ where: $x^2=2^x$

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Solve for $x$ where: $$x^2=2^x$$

Graphing the function ($f(x)=x^2-2^x$) it is clear that there are three solutions.

Two of them are nice solutions. i.e. $x=2,4$

The graph shows a third solution at $x=-0.76666...$

I found this using the Newton-Raphson method but it took quite a few iterations.

What other methods are there for solving such a question?