tolong di bantu sama caranya

misalkan 2^x =a

2^2x= a^2
2^x+1 = 2^x ×2

jadi, a2-10a×2 =-64
a2-20a +64= 0
(a-16)(a-4)
a= 16 atau a=4

kembali tadi permisalannya a= 2^x
a = 2^x = 16, x=4
a = 2^x = 4, x=2

Jadi x = 2 atau4