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a = (3 - 2√2)² = 9 - 12√2 + 8 = 17 - 12√2
odp A
zad 4
(√3 - 2)² - [1/(√3 + 2)]² = 3 - 4√3 + 4 - (√3 + 2)² = 3 - 4√3 + 4 - 3 - 4√3 - 4 = - 8√3
odp D
zad 6
∛1 91/125 + 1 1/5 = ∛216/125 + 1 1/5 = 6/5 + 1 1/5 = 1 1/5 + 1 1/5 = 2 2/5
2 2/5 = 2,4 * 0,8 = 1,92 = 1 23/25
odp C
zad 8
k = (- 2)³ * (2/5)° + (1/3)² * 3 - √9 * (1/3)² = - 8 * 1 + 1/9 * 3 - 3 * 1/9 = - 8 + 1/3 - 1/3 = - 8
odp D