Simiplify. u^2 - 4 / u^2 - 2u 1.) u + 2, u ≠ 2 u + 2/ u, u ≠ 0 u + 2/ u - 2, u ≠ 2 u + 2/u, u ≠ 2, u ≠ 0 if you could show me how you got the answer i would appreciate it!

Here's your rational expression: .  The numerator of that expression is the difference of perfect squares, and that factors into (u-2)(u+2).  In the denominator, you can pull a u out, leaving u(u-2).  When you put those factored expressions into its rational form you have .  We have a common term there, u-2 that will cancel out in the numerator and the denominator.  When you cross those out, what you're left with is .  Hopefully, that is a clear enough explanation.

than do 23.50 times 18 and then divide your answer by 100 than you will get x.