Odpowiedź:
2×(4m×7m+4m×2m+7m×2m)=2×(28²+8m²+14m²)=2×50m²=100m²
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Odpowiedź:
2×(4m×7m+4m×2m+7m×2m)=2×(28²+8m²+14m²)=2×50m²=100m²