No, the UK. But completing the square only takes a minute.
Try completing the square when the coefficients are variables :)
Once you start calculus they let you use a real calculator
That may be true, but in the US there are typically math courses before calculus.
But then we get a calculator.
Even then, it is typically not a symbolic calculator so if your answer is a closed form function of variables, you're SOL with a TI-84.
Maybe we went to radically different schools but I certainly had to calculate by hand using the quadratic formula countless times where calculators were not allowed to be used.
Anyway it distracts from the point so it's not relevant.