Wyłącz czynnik przed znak pierwiastka i zapisz krócej:
f) ∛40+∛135=
... = ∛(8x5) + ∛(27x5) = ∛8 x ∛5 + ∛27 x ∛5 = 2 x ∛5 + 3 x ∛5 = 2∛5 + 3∛5 = 5∛5
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... = ∛(8x5) + ∛(27x5) = ∛8 x ∛5 + ∛27 x ∛5 = 2 x ∛5 + 3 x ∛5 = 2∛5 + 3∛5 = 5∛5