# A not so simple single variable problem..?

• November 9th 2010, 04:24 AM
kuzma
A not so simple single variable problem..?
It's been a while since I've done algebra (grad in neuro) so perhaps I'm missing something very basic but I was wondering if anyone can find the steps to solving this equation:

$(2)2^2^x-22+12^x=0$

Much Appreciated!

PS. the solution is x=~1.04 .. but I'm more interested in the steps to get there!
I've been able to expand $12^x$ --> $3^x2^2^x$ but not much further.. according to the problem only exponent laws should be used to get to the solution..
• November 9th 2010, 04:49 PM
Prove It
Are you sure this isn't

$\displaystyle 2\cdot 2^{2x} - 22 + 2^x$ or $\displaystyle 2\cdot 12^{2x} - 22 + 12^x$.

If it was either of those, it would be a quadratic equation.