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Verified answer
Eksponensial5. 25ˣ - 126 . 5ˣ + 25 = 0
5. (5ˣ)² - 126 (5ˣ) + 25 =0
5ˣ = a
5a² -126 a + 25=0
(5a -1)(a - 25) =0
a = 1/5 atau a = 25
5ˣ₁ = 1/5 --> 5ˣ = 5⁻¹ --> x₁= -1
5ˣ₂ = 25 --> 5x = 5² --> x₂ = 2
x1 . x2 = - 2