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Math Help - quick algerbra question

  1. #1
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    quick algerbra question

    express x^2 - 5x + 1/4 in the form (x-a)^2 - b
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  2. #2
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    Quote Originally Posted by johnsmith666 View Post
    express x^2 - 5x + 1/4 in the form (x-a)^2 - b
    You have already posted this question, reposting is not a good way to get help.
    Have you tried the question? How far can you get?

    Have you done 'completing the square' in lessons yet?

    Try expanding (x-a)^2 - b and comparing coefficients with x^2 -5x +1/4 .
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  3. #3
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    Hi John,

    the question is testing you to figure out what the values of 'a' and 'b' are.

    You must be able to multiply out (x-a)^2 to find them.

    By doing this, you will first see what 'a' is, then you can find 'b'.
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  4. #4
    Super Member bigwave's Avatar
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    do you understand this step
    as mentioned "completing the square"

     <br />
\left(x^2 -\frac{5}{2}x + \frac{25}{4}\right) + \frac{1}{4} - \frac{25}{4}<br />
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  5. #5
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    Quote Originally Posted by johnsmith666 View Post
    express x^2 - 5x + 1/4 in the form (x-a)^2 - b

    (x-5/2)^2-6
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  6. #6
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    But if you don't learn how to find those values, John,
    you'll be just as stuck the next time.
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