tachyons faster than lightHow can hypothesized tachyons travel faster than light?

It is a little convoluted, but ...

First, these are hypothetical particles. We've never found evidence of them. But they are a theoretical possibility according to current mathematical models. THAT implies, for physicists, that there is something wrong /incomplete with the models, since we are reasonably convinced that tachyons faster than lightsuch a particle-with-mass cannot travel FTL.
By traveling backwards through time. They would appear to arrive at their target faster than a beam of light, and perhaps even before the beam left the emitter.

Just to clarify, there is little evidence that such things exist, iirc. There have been some odd experimental resulttachyons faster than lights dealing with light propagation and parts of signals arriving faster than seems possible, but none of these have given any concrete evidence to the exsitence of a faster than light particle.
Their proposed speed would involve "I" or root of minus 1, making it complex.
Not necessarily greater than c. Not real.