dlaczego √72+4√2-√18 + √8= 9√2 ??
wiem ,że :
6√2+4√2-3√2+2√2 -to nie powinno się równać 5√2?
6+4-3+2 = 10 -3 +2 = 7 +2 = 9
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6+4-3+2 = 10 -3 +2 = 7 +2 = 9