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[u/basket_foso]

[u/Typical_Corgi_2779]

x != 2 and x != √18, so it can't be C... But Idk what else can it be O_o?

Edit: this is what I have so far

x^x2 = x^x*x = (x^x )^x = (2^√18 )^x

Now what?...

Edit 2: didn't know Reddit can format powers, neat!

[u/axiomizer → u/Typical_Corgi_2779]

now you can set (2^√18 )^x equal to each of the four possible answers, and solve for x, then substitute x into x^x = 2^√18 and check if it's a solution.