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maka
4x^2 -12 2^x + 32 = 0
(2^x)^2 -12 2^x +32= 0
a^2 -12a +32 = 0
(a-8)(a-4) = 0
a= 8 atau a=4
2^x = 8 atau 2^x =4
x= 3 atau x= 2
jelas kan? kalo ada bagian yang gak dimengerti bilang aja ya:)