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Math Help - Help qith solving question

  1. #1
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    Help qith solving question

    (2-10 √(125+h))/(h√(125+h))x(2+10√(125+h))/(2+10√(125+h))


    need to know how the numerator equals -100h. I tried it but i couldn't see how it happens!
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by instantaneo View Post
    (2-10 √(125+h))/(h√(125+h))x(2+10√(125+h))/(2+10√(125+h))


    need to know how the numerator equals -100h. I tried it but i couldn't see how it happens!
    Spoiler:
    (a-b)(a+b) = a^2-b^2
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  3. #3
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    thanks!
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