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Math Help - Please help with quadratic equations - solving a,b,c

  1. #1
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    Please help with quadratic equations - solving a,b,c

    Hi I am trying to teach myself maths. So go easy on me if these are stupid questions.

    I have the equations
    x^2 - x - 6

    I need to find out the values of A,B,C so I can plug them into the quadratic equation to find the roots.

    The example in the book says

    Ok so for Example 1. where x^2 - x - 6
    What are a, b, and c so we can plug them into the quadratic equation to find x?

    (1)x^2 - (1)x - 6 = 0

    Let's get it into the exact form of [ax^2 + bx +c = 0]

    (1)x^2 + (-1)x + (- 6) = 0
    a b c

    therefore...
    a = 1
    b = -1
    c = -6
    But I do not understand this,... dose this mean that the a,b,c for

    x^2-2x+1
    a= 1
    b= -2
    c= 1

    x^2+2x+5
    a = 1
    b = 2
    c = +1

    ???

    Is that correct?
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  2. #2
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    Joined
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    Quote Originally Posted by anewhobby View Post
    Hi I am trying to teach myself maths. So go easy on me if these are stupid questions.

    I have the equations
    x^2 - x - 6

    I need to find out the values of A,B,C so I can plug them into the quadratic equation to find the roots.

    The example in the book says



    But I do not understand this,... dose this mean that the a,b,c for

    x^2-2x+1
    a= 1
    b= -2
    c= 1

    x^2+2x+5
    a = 1
    b = 2
    c = +1

    ???

    Is that correct?
    yes that is correct and then you can use it in the formula.
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