Računamo po koracima:

1. Izraz u zagradi:
$$\frac{1}{2} - 0.75 = 0.5 - 0.75 = -0.25 = -\frac{1}{4}$$$\frac{1}{2} - 0.75 = 0.5 - 0.75 = -0.25 = -\frac{1}{4}$

2. Potencija:
$$(-2)^3 = -8$$$(-2)^3 = -8$

3. Množenje prvog dijela:
$$\left(-\frac{1}{4}\right) \cdot (-8) = 2$$$\left(-\frac{1}{4}\right) \cdot (-8) = 2$

4. Korijen:
$$\sqrt{\frac{9}{16}} = \frac{3}{4}$$$\sqrt{\frac{9}{16}} = \frac{3}{4}$

5. Zbrajanje:
$$2 + \frac{3}{4} = \frac{8}{4} + \frac{3}{4} = \frac{11}{4} = 2\frac{3}{4} = 2.75$$$2 + \frac{3}{4} = \frac{8}{4} + \frac{3}{4} = \frac{11}{4} = 2\frac{3}{4} = 2.75$

Odgovor: $\frac{11}{4}$$\frac{11}{4}$