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32 + 16x + 8x + 4x^2 - 32 = 45
4x^2 + 24x - 45 = 0
delta = 24^2 - 4 * 4 * (-45) = 576 + 720 = 1296
x1 = (-24 - 36) / 2*4 = - 60/8 = - 7,5 ---- odpada bo x to długość odcinka
x2 = (-24 + 36) / 2*4 = 12/8 = 1,5
odp. Szerokośc tego pasa wynosi 1,5m.