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(2x)² = 4x²
(3x)² = 9x²
(5x)² = 25x²
(8x)² = 64x²
(2x)2= 4x2
(3x)2= 9x2
(5x)2= 25x2
(8x)2= 64x2
(x2 czyli x do kwadratu)