Question

Solve 4^x -2^x - 12 = 0

Answer 1

4^x -2^x - 12 = 0
2^(2x)-2^x-12=0
let 2^x=u
u^2-u-12=0
Solve

Answer 2

an alternative method could be just dividing everything by 2 and getting \[2x^2-x-6=0\]

Answer 3

oh ha sorry I read the q wrong :)

Answer 4

x = 2, is the only solution.