Find all real x that satisfy (2^x - 4)^2 + (4^x - 2)^2 = 196.

a=1; c=(2^a - 4)^2 + (4^a - 2)^2 ; if(c==196, goto3, goto4);printc, a; a++;if(a<1000, goto1, 0)

 

x = 2