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    caroash09's Avatar
    caroash09 Posts: 52, Reputation: 1
    Junior Member
    		  
    #1

    Jul 2, 2009, 08:10 PM
    x-intercepts for following polynomial function
    x-intercepts for the following polynomial function:

    f(x)=x²+x-1



    my ans. Is coming -1+√5/2 something... help me
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
    Ultra Member
    		  
    #2

    Jul 2, 2009, 08:34 PM




    Using the quadratic formula:





    So, one root is

    and the other is
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