Question 317615
x^2 + 18x - 4 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
x=(-18+-sqrt[18^2-4*1-4])/2*1
x=(-18+-sqrt[324+16])/2
x=(-18+-sqrt340/2
x=(-18+-18.439)/2
x=(-18+18.439)/2
x=.439/2
x=.22 ans.
x=(-18-18.439)/3
x=-36.439/2
x=-18.22 ans.