minileksykon45

(\/6 + \/l5) • V3 =    + \Zl5~3 = VŚT9 + Vb~9 = 3\/2 + 3\/5

\fa • y/a = Va2 = a

\fa? • -y/a =    = a ^ = a= v^a¹³

16. Wzory skróconego mnożenia

(a ± fr)² = a² ± 2a6 + 6²

(a ± 6)³ = a³ ± 3a²6 + 3a6² ± 6³

a² - b² = (a + 6)(a - 6)

a³ + 6³ = (a.+ b)(a²-ab + b²)

a³ - 6³ = (a - b)(a² + ab + 6²)

a” — 6ⁿ = (a — 6)(a^n_1 + aⁿ~²6 + aⁿ"³6² + ... + 6""¹)

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