Jawabanmu

2014-09-04T21:20:58+07:00
 2^{2x+2}-18 .  2^{x} + {8} = 2^{2} .   (2^{x})^{2}-18 .  2^{x} +2=

misalkan p=2pangkat-x

4p²-18p+8=(2p    - 8)(2p -1  ) ==== > p=1  dan p=8

2^{x}= 1... x=0    dan  2^{x}=8 .....  2^ x =  2^{3}    x=3