Question 187301
4n^2-26n-42
{{{n = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
n=(26+-sqrt[-26^2-4*4*-42])/2*4
n=(26+-sqrt[676+672])/8
n=(26+-sqrt[1348])/8
n=(26+-36.715)/8
n=(26+36.715)/8
n=62.715/8
n=7.839 ans.
n=(26-36.715)/8
n=10.715/8
n=-1.339 ans.