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    Have i done these questions properly?
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    (Original post by CRPAl)
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    Have i done these questions properly?
    The left most one and the one on the right are incorrect.
    The middle one is correct
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    (Original post by CRPAl)
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    Have i done these questions properly?
    First one you seem to have added the quadratic right at the end not subtracted it. Second one looks fine. Third one the 3 cancels in the powers, you don't cube the 3 in the denominator which it looks like you have done.
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    (Original post by metaltron)
    First one you seem to have added the quadratic right at the end not subtracted it. Second one looks fine. Third one the 3 cancels in the powers, you don't cube the 3 in the denominator which it looks like you have done.
    Would the answer to the first one be

    4a^2 -13a +16?

    I dont understand how to work out the third one
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    (Original post by CRPAl)
    Would the answer to the first one be

    4a^2 -13a +16?

    I dont understand how to work out the third one
    Again check your subtraction for the first one.
    As for the third: When raising (Something)n to another power say m the new power = m*n
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    What answer are you getting for q1?

    i have tried the third one again, so if you dont cube the 3 in the denominator:

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    what answer are you getting for q1?

    for q3 is it

    1/125a^2
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    (Original post by CRPAl)
    what answer are you getting for q1?

    for q3 is it

    1/125a^2
    Yep its 1/ (125a^2)
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    (Original post by CRPAl)
    what answer are you getting for q1?

    for q3 is it

    1/125a^2
    Is that 1/(125a2) or 1/125 a2
    You need to subtract ALL of the quadratic. You have everything correct apart from this.
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    1/(125a^2) is what i think it is?

    q1:
    4a^2 -13a -16?
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    (Original post by CRPAl)
    1/(125a^2) is what i think it is?

    q1:
    4a^2 -13a -16?
    Correct for 1/(125a^2)
    You still need to minus the 4a2
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    About 5th time lucky?

    -4a^2 -13a -16?
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    (Original post by CRPAl)

    About 5th time lucky?

    -4a^2 -13a -16?
    Seems legit
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    got there eventually thanks for your help guys
 
 
 
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