tolong bantuanya yah.....

f(x) = x²-2x+4
g(x) = 2x+3
(f•g)(x)
= f(g(x))
= f(2x+3)
= (2x+3)²-2(2x+3)+4
= 4x²+12x+9-4x-6+4
= 4x²+8x+7