zamień sumę na iloczn (rozpisz)
8x(2a-3b)+6x(2a-3b)-(2a-3b)
8x(2a-3b)+6x(2a-3b)-(2a-3b) = (2a - 3b)(8x + 6x - 1) = (2a - 3b)(14x - 1)
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8x(2a-3b)+6x(2a-3b)-(2a-3b) = (2a - 3b)(8x + 6x - 1) = (2a - 3b)(14x - 1)