@Northcountry 

It depends on the signal strength. 

So if where the TV is at has a very weak signal, placing the extender at the halfway point from the TV to the router would help. If the TV has a decent signal then using an extender will just get the extender in the way of getting to the router. What you could also do is a speed test with your cell phone and compare going to the router and to the extender from where the TV is. If there is no difference then I would stick to the router.