What's Wrong? Q7

27 comments:

  1. This comment has been removed by the author.

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  2. 7b) Is wrong because the question asked for without the use of the calculator.

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  3. he used calculator instead he should use algebra

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  4. Umm... He/She used a calculator.

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  5. He/She should not use a calculator

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  6. The student is not following the method '(a+b)(a-b)-a^2'

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  7. 7b is wrong because the person uses the calculator when the question specifies not to use the calculator because it is hard to calculate such a big value without the use of the calculator.

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  8. The question stated without the use of a calculator, but the person used a calculator for this, and did not use the algebra method.

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  9. The student was using a calculator but not a method without a calculator to solve the question

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  10. He used the calculator to solve the answer, which can be inferred through (9975-10000) whereas he should have used the algebraic manipulation or expressions given in 7(a)

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  12. This is wrong because, the person should have used the same method he/she used for the question above.

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  13. Clearly can be seen that calculator is being used.

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  14. did not show how to get 9975

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  15. He should not use calculator, he should use the method from the prev question

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  16. The person must have used a calculator

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  18. How did he get 9975? Calculator?
    No working too. :P

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  19. he did not show his working on how he got his answer 9975

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  20. The person might have forgot to bring calculator, so he thought nothing was wrong by just doing it manually...
    Anyway, the person didn't apply algebra to it, and used a "calculator".

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  21. He did not use the algebra method to do the sum.

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  22. He did not use the algebra method to do the question and used the calculator.

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  23. He or she used a calculator instead of using the formula above.

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  24. Ok i understand now thanks! >.<
    I could have assume that x is 100

    So when the question asked 105x95=100^2
    If 'x' was 100
    then my question would become:
    (x+5)x(x-5)-x^2
    then i could solve it :D

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