what expression is equivalent to 2 - x-1/x+2

Answer 1

2 - x-1/x +2 is ambiguous. but as written it means

4 -x -(1/x) = 4x/x -x^2/x - 1/x

= (-x^2 +4x -1)/x

but you may have meant instead

2 -(x-1)/(x+2)

= (2x+4)/(x+2) - (x-1)/(x+2)

= (x+5)/(x+2)

Answer 2

It's hard to determine what the problem is since you did not use parentheses to write it. I'm going to GUESS that it is:

If so, to simplify the problem, you need a common denominator. Since 2 can also be written as 2/1, the common denominator would be "x + 2". You would multiply 2/1 be (x + 2)/(x+ + 2) and the results would be 2(x + 2)/(x + 2) or (2x + 4)/(x + 2). That means the problem is now:

To simplify, combine like terms in the numerator.