Buna seara! Ma puteti ajuta cu aceasta problema?
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∛7 +5√2 -∛7 -5√2 =∛1+6 +5√2 -∛1+6 -5√2 =∛1 +2√2 +3√2 +6 -∛1 -2√2 -3√2 +6=
∛(1+√2)³ -∛(1-√2)³ =|1+√2| -|1-√2|=√2 +1 -√2 +1=1+1=2 .