Re: Quadratic problem

Posted by Noel on May 03, 2014; 12:34pm
URL: http://discussion-forum.276.s1.nabble.com/Quadratic-problem-tp7588370p7588372.html

Put x^3=t so the equation becomes
t^2+t-2=0
solve this to get t=1 and t=(-2)
i.e. x^3=1 and (-2)
so x=1 and x=(-2)^(1/3)
hence option b