You would take the answer of the square root problem and find the number that you can multiply by its self that would make that answer correct.
Answer:
x = 16
Step-by-step explanation:
(5x + 12)° + (6x - 8)° = 180°
(5x + 12 + 6x - 8)° = 180°
(11x + 4)° = 180°
11x + 4 = 180
11x = 180- 4
11x = 176
x = 176/11
x = 16
The definition is pretty simple:

So, we only have to sum the expressions:

Answer:
I don't know how to do this thing