Question 261839
x^2-2x-13=0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
x=(2+-sqrt[-2^2-4*1*-13])/2*1
x=(2+-sqrt[4+52])/2
x=(2+-sqrt56)/2
x=(2+-7.48)/2
x=(2+7.48)/2
x=9.48)/2
x=4.74 ANS.
x=(2-7.48)/2
x=-5.48/2
x=-2.74 ans.