Answer:
9 + 10 +x= 21
x=21-19
x=2
add 2 in left hand side to get 21
Answer:
5, 3
Step-by-step explanation:
correct on edge2020
Answer:
#2 is the closest to the actual roots.
Step-by-step explanation:

is not a root, but 0.68078 is.
The other roots are -0.24572 and 4.9816. The closest option is #2.