why 1=-1/-1

因為負負得正
個負號可以係除法中約左...所以1=-1/-1

-1 and -1 are the same......so .....they will cancel out ......and equal 1 lol......understant????

因為負負得正.
-1(負)/-1(負) = 1(正)

since n / n = 1
therefore -1 / -1 = 1