Q15 Share your answers (2 Viewers)

[lolwot]

i thought this was correct until now but i have been informed by a friend who just checked it that technically it's (2 +/- rooty)^2 and if you sub values you will find that the correct answer is
x^2 = (2-sqrt(y))^2
= (4 - 4sqrt(y) + y)

wtf bos???