SOLUTION: use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to find the roots; ju Algebra -&gt; Algebra -&gt; Real-numbers -&gt; SOLUTION: use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to find the roots; ju Log On You can put this solution on YOUR website! 2x^2 + x - 1 = 0 I'll do one and let you do the rest: 1st: Identify a,b,c for the problem: In this case a=2,b=1,c=-1 2nd: Evaluate b^2-4ac In this case you get 1^2-4(2)(-1) =1+8=9 3rd: If the value is &gt; there are two real unequal roots If the value is 0 there are two real equal roots If the value is In this case, since the value is 9, there are two real unequal roots. I'll leave the rest to you. Cheers, Stan H.