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.

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)

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".

The student used a calculator

ReplyDeleteThis comment has been removed by the author.

ReplyDelete7b) Is wrong because the question asked for without the use of the calculator.

ReplyDeletehe used calculator instead he should use algebra

ReplyDeleteUmm... He/She used a calculator.

ReplyDeleteHe/She should not use a calculator

ReplyDeleteThe student is not following the method '(a+b)(a-b)-a^2'

ReplyDelete7b 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.

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

ReplyDeleteThe student was using a calculator but not a method without a calculator to solve the question

ReplyDeleteHe 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)

ReplyDeleteThis comment has been removed by the author.

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

ReplyDeleteClearly can be seen that calculator is being used.

ReplyDeletedid not show how to get 9975

ReplyDeleteHe should not use calculator, he should use the method from the prev question

ReplyDeleteUsed calculator

ReplyDeleteby Darryl

ReplyDeleteThe person must have used a calculator

ReplyDeleteThis comment has been removed by the author.

ReplyDeleteHow did he get 9975? Calculator?

ReplyDeleteNo working too. :P

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

ReplyDeleteThe person might have forgot to bring calculator, so he thought nothing was wrong by just doing it manually...

ReplyDeleteAnyway, the person didn't apply algebra to it, and used a "calculator".

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

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

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

ReplyDeleteOk i understand now thanks! >.<

ReplyDeleteI 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