Usuń niewymierność z mianownika:
1 / 1-2pod pierwiastkiem 2
/ - kreska ulamkowa
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Wzór:
(a-b)(a+b)=a²+b²
1/(1-2√2) * (1+2√2)/(1+2√2) = (1+2√2)/(1-8) = (-1-2√2)/7
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Wzór:
(a-b)(a+b)=a²+b²
1/(1-2√2) * (1+2√2)/(1+2√2) = (1+2√2)/(1-8) = (-1-2√2)/7