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Thread: Difference of Squares Problem

  1. #1
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    Post Difference of Squares Problem

    I was doing a problem on practicem 4x^2 - 361. I know how to use the quadratic formula but is it impossible to factor difference by squares when the second number is a prime number. can you factor using a fraction or something?


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  2. #2
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    Re: Difference of Squares Problem

    Quote Originally Posted by kingcobrasnake View Post
    I was doing a problem on practicem 4x^2 - 361. I know how to use the quadratic formula but is it impossible to factor difference by squares when the second number is a prime number. can you factor using a fraction or something? Click image for larger version. 

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    $4x^2-361=(2x-\sqrt{361})(2x+\sqrt{361})$
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  3. #3
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    Re: Difference of Squares Problem

    oh woah, that makes so much more sense. idk how i didnt think of that

    thx
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