Question

combining functions

x^2-1
------
x^2+x

Answer 1

\[\frac{ \left( x-1 \right) \left( x+1 \right)}{ x \left( x+1 \right) }=\frac{ \left( x-1 \right) }{ x }\] something like that

Answer 2

thank you

Answer 3

no problem :)

Answer 4

x cannot be -1 or zero

Answer 5

for x = -1 the answer is zero 0/-1

Answer 6

(-1)^2 + (-1) = 0

Answer 7

yes 0/-1 is 0 >> that it can be x=-1
but x=0 >> f(x) does not exist

Answer 8

For x is 0 or -1 the original expression has a denominator of 0 (check it)

Answer 9

I mean for (x-1)/x ><"

Answer 10

That's what I am telling you, you cannot just cancel the x+1....

Answer 11

OK :)

Answer 12

I do not know the objective of this prob. to find ???

Answer 13

Or, you can, only if you specify that x is not 0 or -1

Answer 14

I don't know either, what "combining" means?

Answer 15

It's a division problem

Answer 16

Pinguine has given the answer but you should also specify that the original expression is undefined for x = 0 or -1