Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Help with question

So this question has been really getting me, I know the answer is the first option but am wondering how to work that out, could anyone show me? Thank you!

You just rationalize the denominator so multiply top and bottom by:

Spectacle.T20976.png

Spectacle.T20976.png

So:

Attachment not found

Hope this helps :smile:

:smile:

(edited 7 years ago)

formula.png5.9KB

Original post by hischebioict

So this question has been really getting me, I know the answer is the first option but am wondering how to work that out, could anyone show me? Thank you!

You need to know the rule "difference between two squares" it is (a+b)(a-b)=a²-b²

Capture.JPG6.5KB

Study Forum Helper

Original post by AlexJT

You just rationalize the denominator so multiply top and bottom by:

Spectacle.T20976.png

Spectacle.T20976.png

So:

[WORKING OUT]

Hope this helps :smile:

:smile:

Let's try and not do the question for the person. You can point him to what needs to be done just don't spoil it.

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