Usuwając niewymierność z mianownika ułamka 3, otrzymamy ?
3²/√7-2 = 9/√7-2 * (√7+2)/(√7+2) = 9(√7-2) /(7-4) = 9(√7+2)/3 = 3(√7+2)
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3²/√7-2 = 9/√7-2 * (√7+2)/(√7+2) = 9(√7-2) /(7-4) = 9(√7+2)/3 = 3(√7+2)