[tex]f(x) = 3x - 4.g (x) = 2x ^{2} + 4x - 5[/tex] tolong tentukan a.(f°g)(x) b.(g°f)(x)

A.
f o g (x) = f(2x² + 4x -5)
f o g (x) = 3(2x² + 4x -5) - 4
f o g (x) = 6x² + 12x - 19

B.
g o f (x) = g (3x - 4)
g o f (x) = 2(3x - 4)² + 4(3x - 4) - 5
g o f (x) = 2(9x² -24x + 16) + (12x - 16 - 5)
g o f (x) = 18x² - 48x + 32 + 12x - 21
g o f (x) = 18x² - 36x + 11