Question

simplify and state restrictions x-y/y-x

Answer 1

Well, if you do this:

\[\frac{x-y}{y-x} = \frac{-(y-x)}{y-x} = -\frac{y-x}{y-x}\]

You might realize what it simplifies to at least.

Answer 2

For restrictions, just ask yourself what would make the denominator equal zero. There's a value that x cannot equal and a value that y cannot equal.

Answer 3

0?

Answer 4

The denominator cannot equal zero. But what values of x and y would make the denominator zero? Also, did you figure out what the entire expression simplifes to?

Answer 5

i don't know because if you divide y-x by y-x isn't it 0?

Answer 6

or -1?

Answer 7

\[\frac{\text{anything}}{\text{itself}}= 1\]

Yes, it simplifies to -1

Answer 8

What about the restrictions?

Answer 9

(y-x)(y-x)=0 , y=x?

Answer 10

When figuring out restrictions, you only need to pay attention to the original expression.

Answer 11

\[y \ne x\] is one restriction though. There is another.

Answer 12

x=y?

Answer 13

Well, nevermind. That's the restriction. Good job.

Answer 14

oh okay thanks!

Answer 15

I usually write restrictions with the not equal sign. As it shows what it cannot equal.