tolong bantu ya sama caranya makasihh

25)
(g o f) (x) = (x - 1)² + 2 (x - 1) - 1
= x² - 2x + 1 + 2x - 2 - 1
= x² - 2 (e)

26) f(x) = ( x - 3) / (2x - 4)
y = (x - 3) / (2x - 4)
y (2x - 4) = (x - 3)
2xy - 4y = (x - 3)
2xy - x = 4y - 3
x (2y - 1) = 4y - 3
x = (4y - 3) / (2y - 1)
f(x) -¹ = (4x - 3) / (2x - 1)
(c)
cara 2
misal (ax - b) / (cx - d)
= (dx - b) / (cx - a)

27) f(x) / g(x)
= (x - 3) / x² - 4x + 3
= (x - 3) / (x - 3) (x - 1)
x - 3 dicoret karena sama
= 1 / (x - 1) (b)