Answer:
x = 2
Step-by-step explanation:

x ≠ 0
x ≠ - 2
x ≠ - 1

x = 2
If you do 27-12 (which is 15) you add 15 to 13 and 20
Answer:

Step-by-step explanation:
We want to simplify:

Recall the Pythagorean Identity:

So:

Substitute:

Factor. We can use the difference of two squares pattern:

Cancel. Hence:
