Answer:
third option
Step-by-step explanation:
We just have to calculate 2x² - 4x - (x² + 6x). 2x² - x² = x² and -4x - 6x = -10x so the answer is x² - 10x.
Answer:
x=a+b
Step-by-step explanation:
Just move a to the other side (by adding it)
The actual measure of angel A is actually 190