100BASE-FX is a version of fastethernet over optical fibre. It uses two strands of multimode fibre[?] for receive and transmit. Each segment has a maximum length of 412 meters.
... is equivalent to
<math>x^2+\frac{b}{a}x=-\frac{c}{a}.</math>
The equation is now in a form in which we can conveniently complete the square[?]. ...