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Math Help - Factorise

  1. #1
    Senior Member Mukilab's Avatar
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    Factorise

    Can this be factorised?
    4p^2-9q^2

    Yes I'm sure it's a p and q, not p and p or q and q
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  2. #2
    MHF Contributor
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    Quote Originally Posted by Mukilab View Post
    Can this be factorised?
    4p^2-9q^2

    Yes I'm sure it's a p and q, not p and p or q and q
    Yes, use the difference of two squares.

    4p^2 - 9q^2 = (2p)^2 - (3q)^2

     = (2p - 3q)(2p + 3q).
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