(√5-2√7)²=(√5)²+(2√7)²-2×√5×2√7=5+28-4√35=33-4√35≈33-4×5,9=33-23,6=9,4
0dp; Jest to około 9,4.
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(√5-2√7)²=(√5)²+(2√7)²-2×√5×2√7=5+28-4√35=33-4√35≈33-4×5,9=33-23,6=9,4
0dp; Jest to około 9,4.