bantuu....................

a)
f'(x) = 4.3x² + 2.2x - 5.1
= 12x² + 4x - 5

b)
f(x) = 36 - 24x + 4x²
f'(x) = 0 - 24.1 + 4.2.x
= 8x - 24

c)
f(x) = 2x² + 2.(x^-2)
f'(x) = 2.2x + 2.(-2).x^-3
= 4x - 4.(x^-3)