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# indicies help watch

1. I am not sure of why the left hand side of the expression become 2x+1 and not 2x-1 ?

thanks
2. When you divide indices, you subtract.

So, you have: 3x - (x-1) [note the brackets]

This simplifies to 2x + 1 as required
3. Well, when you divide, you take away the powers, so the powers will be 3x - (x - 1), which gives 3x - x -(-1), and therefore 2x + 1.
4. You need to remember the brackets. You're subtracting (x+1) from 3x, so it becomes 3x-(x+1) or 3x-x-1 as the others have said already

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