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x^2-5x+5=0
trus pake quadrat sempurna
(fog) = f(g(x))
masukkan
(fog) = f(x² - x + 2)
x nya di masukkan
(fog) = 4(x² - x + 2) - 3
(fog) = 4x² - x + 2 -3
(fog) = 4x² - x - 1
udah ini jawabnnya