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Math Help - Expand and simplify 5 - (2-x)^2

  1. #1
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    Expand and simplify 5 - (2-x)^2

    Question: Expand and simplify 5-(2-x)^2

    Ok, I know the first step is to do change the negative thingy but I don't know how to. It doesn't seems to make sense to me, can someone share their first step on solving this problem? It's frustrating.........
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  2. #2
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    Re: Expand and simplify 5 - (2-x)^2

    Quote Originally Posted by FailInMaths View Post
    Question: Expand and simplify 5-(2-x)^2
    Ok, I know the first step is to do change the negative thing
    No it is not. First, expand.
    5-(4-4x+x^2)
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    Re: Expand and simplify 5 - (2-x)^2

    Quote Originally Posted by Plato View Post
    No it is not. First, expand.
    5-(4-4x+x^2)
    Oh, I am starting to see something, so after this I just have to evaluate?

    Answer: 1+4x-x^2 ?
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    Re: Expand and simplify 5 - (2-x)^2

    Quote Originally Posted by FailInMaths View Post
    Oh, I am starting to see something, so after this I just have to evaluate? Answer: 1+4x-x^2 ?
    Yes.
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  5. #5
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    Re: Expand and simplify 5 - (2-x)^2

    Quote Originally Posted by Plato View Post
    Yes.
    Thank you!
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