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Verified answer
2.4^x -5.2^x + 2 = 02.(2^2)^x -5.2^x + 2 = 0
2.(2^x)^2 -5.2^x + 2 = 0
misal 2^x = a, maka
2a^2 -5a + 2 = 0
(2a - 1)(a - 2) = 0
2a -1 = 0 atau a - 2 = 0
2a = 1 atau a = 2
a = 1/2
untuk a = 1/2, maka 2^x = 1/2
2^x = 2^-1
x = -1
untuk a = 2, maka 2^x = 2
2^x = 2^1
x = 1
HP = { -1, 1 }