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B. 12,90 + β³ = 110,78
β³ = 110,78 - 12,90
β³ = 97,88
C. 3 · 3 · 3 · 3 · α · α = 200
81 · α² = 200
D. α + α · α = 158,11
α + α² = 158,11
α² + α - 158,11 = 0
Δ = b² - 4ac = 1² - 4 · 1 · (-158,11) = 1 + 632,44 = 633.44