Because these are not like terms, they cannot be combined. The variables are different, that's what makes them not like terms
Answer:
4 and then 15
Step-by-step explanation:
Difference means subtract so we can reduce the choices right away to first and third choices. of the only the first is the difference of squares, namely x² - 4²
Answer:C
20-3=17
Step-by-step explanation:
Answer:
31.42cm
Step-by-step explanation: