You could add up all the relative frequencies to make sure that you have 100% accounted for.
The relative frequency is the percent out of 100% for a particular item. If you have found the relative frequency for all items, it should equal 100%.
The answer to the question
Answer:
(6y+1)(6y-1)
Step-by-step explanation:
Difference of square (You may want to search it up if you want to learn more)