Zadanie 2. Oblicz.
a) (1¼-⅔)²
b) -2 x5²
c) -4²/√25-9
d) (√121-7½)³

a) (15/12 - 8/12)² = (7/12)² = 49/144
b) -2 ∙ 25 = -50
c) -16/√16 = -16/4 = -4
d) (11 - 7½)³ = (3½)³ = (7/2)³ = 343/8 = 42⅞