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Math Help - implied domain of a function

  1. #16
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by shipwreck View Post
    ok - so for my problem then...

    (3x^2 - x - 1 + a) - (3x^2 - x - 1),

    and then combine all like terms? is that right though? that doesn't feel right, as everything cancels out obviously, leaving only a behind.
    you are right that that is not right

    look at my post again. whatever is in brackets, we replace x with it. for the first part, that is not what you did. you wrote g(x) and then added a at the end. that is not what my post told you to do

    look at the bc + d example
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  2. #17
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    [3(x+a)^2 - (x+a) -1)] - 3x^2 -x - 1

    is that more like it?
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  3. #18
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by shipwreck View Post
    [3(x+a)^2 - (x+a) -1)] - 3x^2 -x - 1

    is that more like it?
    almost. missing some brackets. see where?

    and the red parentheses shouldn't be there
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