


Note:
Do the square first, and then you do mathematic operation between the parentheses. And, then do the
mathematic operation in the outside of parentheses.
Thank you.
Answer:

Step-by-step explanation:
Given the expression

solving the expression



so the expression becomes


Thus,

Given rational expression is:

Now we can simplify this by factoring as shown below:





Hence final answer is 
Answer:
#16 is linear but idk what 17 is
Answer:
It is the longest one (20).
Step-by-step explanation:
The hypotenuse is the length opposite the right angle and between the legs. In this case it is the longest one.