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Math Help - quadratic expressions

  1. #1
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    quadratic expressions

    hi,

    i have to work this out, its a quadratic equation:

    x^2+8x+16=0
    would the brackets be - (x+4) (x+4) because 4x4=16 and 4+4=8???

    thanks
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  2. #2
    MHF Contributor Siron's Avatar
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    Re: quadratic expressions

    Indeed:
    x^2+8x+16=0 \Leftrightarrow (x+4)(x+4)=0 \Leftrightarrow (x+4)^2=0
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  3. #3
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    Re: quadratic expressions

    Quote Originally Posted by andyboy179 View Post
    hi,

    i have to work this out, its a quadratic equation:

    x^2+8x+16=0
    would the brackets be - (x+4) (x+4) because 4x4=16 and 4+4=8???

    thanks
    Can't you check your answer yourself simply by expanding it!?

    (I noticed that you've started studying calculus. Fact: Algebraic competency - eg. doing things like what I have suggested - will be expectd and assumed by your teacher).
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