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Math Help - factorise

  1. #1
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    factorise

    hi,
    i need to know how i would factorise 3a^2b - 12ab^2?

    i haven't done this for a while but would it = 3ab(a - 4b)??

    if this is wrong could you please show me where im going wrong but if it is correct could you also let me know!!

    cheers!
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  2. #2
    Senior Member BAdhi's Avatar
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    is it 3a^2b - 12ab^2,

    it is obviously you answer take 3ab out of it
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  3. #3
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    e^(i*pi)'s Avatar
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    Your answer is correct
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  4. #4
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    so if the question were 3x^2 - 4x, i would do simular to what i just did? so it would be x(3x -4)?
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  5. #5
    Senior Member BAdhi's Avatar
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    yes (reverse of distributive law)
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