To solve this problem you must apply the proccedure shown below:
1- Solve the substraction in the parenthesis and square it:

2- Apply the distributive property and solve the addition:

The answer is: 
Answer:
8x+5i
Step-by-step explanation:sorry if its wrong
Answer:

Step-by-step explanation:
The ratio of pencils to erasers is

Convert the ratio to a fraction.

The fraction is now pencils to erasers.
The fraction of the number of erasers to pencils is:

Answer:
I cant see the whole thing