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

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

The first parenthesis reduces to zero. Check that.

I have the answers in the back of my book (just not how to get there) the book shows the answer as
6(x-1)/x(2x+1). When I solve, I get
6(2x-1)/(2x+1), but I kinda stink at this stuff.

OK, I think I understand what you meant to type:

[(x+1)/(2x-1) - (x-1)/(2x+1) ]* [(2x-1/x - (2x-1)/x^2)]

common denominator in first [] is (2x-1)(2x+1)

first bracket only.
6x/(2x+1)(2x-1)*[(2x-1)(x-1) ]/x^2 [(x+1)(2x+1) - (x-1)*(2x-1) ]/(2x-1)(2x+1)

[2x^2+3x+1 - 2x^2+3x -1]/(2x+1)(2x-1)
6x/(2x+1)(2x-1)
second bracket:
[(2x-1/x - (2x-1)/x^2)]
[(2x^2-x - 2x+1 ]/x^2
[(2x^2-3x +1 ]/x^2
[(2x-1)(x-1) ]/x^2
combining the two brackets...
6x/(2x+1)(2x-1)*[(2x-1)(x-1) ]/x^2
The 2x-1 divides out..
6x/(2x+1) *[ (x-1) ]/x^2 as does x
6 /(2x+1) *[ (x-1) ]/x
6(x-1)/x(2x+1)

Ok, Thank you so much for your help!

1-2/x divided by x+4/9x
How do I solve this problem?

What is Rational Expressions?

5 8
____ + ____
y-3 3-y

To solve the expression (1-2/x) divided by (x+4/9x), you can follow these steps:

1. Simplify each expression separately.
- Simplify (1-2/x) by finding a common denominator. The common denominator is x, so multiply 1 by x to get x, then subtract 2/x from 1, resulting in (x-2)/x.
- Simplify (x+4/9x) by finding a common denominator. The common denominator is 9x, so multiply x by 9 to get 9x. Then add 4/9x to x, resulting in (10x+4)/9x.

2. Invert the second fraction and multiply.
- To divide fractions, you invert (flip) the second fraction and multiply it by the first fraction. The second fraction is (10x+4)/9x, so invert it to get 9x/(10x+4).
- Multiply the first fraction (x-2)/x by the inverted second fraction (9x)/(10x+4). This gives you [(x-2)/x] * [9x/(10x+4)].

3. Simplify the result.
- Cancel out any common factors between the numerator and denominator. In this case, there are no common factors to cancel out.
- Multiply the numerators and multiply the denominators. This gives you (x-2)*(9x) on the top and x*(10x+4) on the bottom.
- Expand and simplify the numerator and denominator. (x-2)*(9x) expands to 9x^2 - 18x, and x*(10x+4) expands to 10x^2 + 4x.
- Combine like terms in the numerator and denominator. You have 9x^2 - 18x over 10x^2 + 4x.

So the simplified expression is (9x^2 - 18x)/(10x^2 + 4x).