hey who ever u r i got the answer for u.telling u something tht go order wise and get ur answer.
the no not possibly will be a perfect sqr. so u can actaually do it calmly!ur answer + question is toooo difficult.
the answer by me is not valid.
3/2 x -1 + sqrt of (2^2 -7 x -4)
=-3/2 + sqrt of 12
sqrt of 12 does not come in whole nos. u cant add approximation
( if u do it this way)