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Math Help - need help w/problem

  1. #1
    Junior Member
    Joined
    Jun 2005
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    need help w/problem

    Evaluate: (a-2b)(a + 2b)

    My answer

    a^2 + -4b^2 = -4a^2b^2

    Does that look right?
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  2. #2
    Site Founder MathMan's Avatar
    Joined
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    The answer is just a^2 - 4b^2

    You cannot combine the a^2 and the -4b^2
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  3. #3
    Junior Member
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    Jun 2005
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    thank you
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