Answer:

Step-by-step explanation:
Given

Required
Find x
We have:

Rewrite as:

Expand

Factorize

Factor out x + 520

Split

Solve

Side length must be positive;
So:

Answer:
5+6=11
11-6=5
11-5=6
Step-by-step explanation:
You can just use a calculator but when you add the numbers all together you get 323