True that, but when theres left over time in the exam its best to make sure. But factorising is easy as anyway.
I panic more with bitches like this: 3x+5/x+2 >3x+4
Thats the type of questions that take forever and the smallest mistake can throw off everything.
After practise, using the quadratic formula will be a breeze. Plus you could probably do it in your head after a while, if you're good at that sort of stuff.