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    (Original post by Sophhhowa)
    How do I do A? Plz can someone just show me the working and explain y?

    You've been told what X and Y are and need to substitute them in. Use the laws of indices to help. For example you know:

    Ab x Ac = Ab+c

    Therefore you can work out:

    2p+q = 2p x 2q

    and since you know what 2p and 2q are you know that 2p x 2q = X x Y = XY

    If you don't know your laws of indices then go find them out before you continue.
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