What's Wrong? Q14 (Type 3)

Describe what's wrong with the working and/or answer.
Suggest how it should look like.


6 comments:

  1. (9/16n)(9/16n) is equal to (81/256n). It should be (3/4n) instead.

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  2. (9n/16)^2 is not equal to (9n/16)(9n/16). It should be (3n/4)(3n/4).

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  3. 9/16*9/16 won't give you 9/16. This will only be correct if there was a bracket covering 9/16n as a whole term. The correct square root should be 3/4n.

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  4. The answer should be(1/2m+3/4n)(1/2m-3/4n)

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  5. 9/16^2 ≠ (9/16)(9/16)
    so the answer should be (1/2m+4/4)(1/2m-4/4)

    ReplyDelete