Answer:
1 and 4, 2 and 3, 5 and 8, 6 and 7
Step-by-step explanation:
Any of those would work
If your looking for X, it would be X = 7
Answer:

Step-by-step explanation:
It by root you mean radical equations, well then I can’t help you there, as there is too much stuff to cover.
If you mean zeros, then to find the root of a function you just find the zeros.