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f(x)' = 2x - 3
2x = 3
x = 3/2
f(3/2) = (3/2)^2 - 3(3/2) - 4
= 9/4 - 9/2 - 4
= 9/4 - 18/4 - 16/4
= -25/4
3/2 , -25/4
maaf