- #1

- 324

- 4

Problems like:

**Example 1:**x^-2 - y^-2 / x^-1 + y^-1

**Example 2:**x^-1 + y^-1 / (x+y)^-1

If you noticed, I seem to be having problems with the problems involving negative squares. Any help on how to work these problems is greatly appreciated.

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- Thread starter Cod
- Start date

- #1

- 324

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Problems like:

If you noticed, I seem to be having problems with the problems involving negative squares. Any help on how to work these problems is greatly appreciated.

- #2

BoulderHead

Start by turning those negative rascals positive. That is, X^-1 becomes 1/X, etc. After you've done that take another look at your problem (it will be less confusing then) and decide on your next course of action.

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- #3

- 324

- 4

Example 1:x^-2 - y^-2 / x^-1 + y^-1

So the correct answer would be:

2y - 2x / y + x ??

- #4

jcsd

Science Advisor

Gold Member

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(x

- #5

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Originally posted by jcsd

(x^{-2}- y^{-2})/(x^{-1}+ y^{-1}) ?

That is correct. Sorry I couldn't make it look better. I'm not familiar with the coding for making squares and such.

- #6

HallsofIvy

Science Advisor

Homework Helper

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The formula you give first: x^-2 - y^-2 / x^-1 + y^-1

could be interpreted as x

The first of the two would be technically correct but I suspect you mean the second.

To simplify (x

You get (y

- #7

BoulderHead

Not according to my calculations.So the correct answer would be:

2y - 2x / y + x ??

Cod,

Could you show what the problem looked like immediately after making the exponents positive?

[edit]

Cod,

Scratch that. Better do it as HallsofIvy's showed (if you can figure out where the X

[edit]

HallsofIvy,

Did you type in a '-' where a '+' was supposed to go?

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- #8

HallsofIvy

Science Advisor

Homework Helper

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It should be (y

I must have rocks in my head!

- #9

BoulderHead

Why, that's nothing at all. I’m running a regular sand and gravel business over on my end!Originally posted by HallsofIvy

… I must have rocks in my head!

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