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quadratic problems C1 watch

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    Hi,

    Really appreciate some help on this, as I have no idea how to solve...

    1. Find the range of possible values of k if the following equations have
    i. no roots
    ii. one (repeated) root
    iii. two real and distinct roots

    a. 2x^2 - x + k = 0

    b. kx^2 - 4x - 1 = 0

    c. x^2 + k = 0

    Thanks!
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    The discriminant is b^2 - 4ac. If it's less than 0, there's no real roots. If it's equal to 0, there's a repeated root. If it's more than 0, there are two roots.

    Hope that helps
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    (Original post by Pork and Beans)
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    The discriminant is b^2 - 4ac. If it's less than 0, there's no real roots. If it's equal to 0, there's a repeated root. If it's more than 0, there are two roots.

    Hope that helps
    yeah thanks, that helps, will give it a go +rep
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    We were learning about this today in class!

    I'm guessing he gave you the right answer
 
 
 
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