Diket: f(x)=2+3x g(x)=2x²+x h(x)=5-4x tentukan: a.(fog)(x) b.(gof)(x) c.(hof)(x) d.(hof)(-2) Jawab...ya besok dikumpulkan

a) fog(x) = f(g(x))
fog(x) = 2 + 3(2x²+x) = 2 + 6x² + 3x
b) gof(x) = g(f(x))
gof(x) = 2(2+3x)² + 2 + 3x
= 2(4+12x+9x²) + 2 + 3x
= 8 + 24x + 18x² + 2 + 3x
= 18x² + 27x + 10
c) hof(x) = h(f(x))
hof(x) = 5 - 4(2 + 3x) = 5 - 8 + 12x = -3 + 12x
d) hof(-2) = -3 + 12(-2) = -3 - 24 = -27