Hi, I have some equation that I am having trouble solving. (1) $\displaystyle 2(2^{2x})-5(2^x)+2=0$ must find x

(2) $\displaystyle 4^x-6(2^x)-16=0$

(3)$\displaystyle 3^{2x+1} -26(3^x)-9=0$ Must also find x for both of them. and

I also tried this one and came up with the answer y=1 (4)$\displaystyle \log_{2}x+\log_{x}2=2$ I have to ind x

Can anyone please help me solve these problems? I tried them but I am getting a different answer that the book has.