Question 311853
x^2 + 4x - 7 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
x=(-4+-sqrt[4^2-4*1*-7])/2*1
x=(-4+-sqrt[16+28])/2
x=(-4sqrt44)/2
x=(-4+-6.633)/2
x=(-4+6.633)/2
x=2.633/2
x=1.317 ans.
x=(-4-6.633)/2
x=-10.633/2
x=-5.317 ans.