Answer with Step-by-step explanation:
Let F be a field .Suppose
and 
We have to prove that a has unique multiplicative inverse.
Suppose a has two inverses b and c
Then,
where 1 =Multiplicative identity

(cancel a on both sides)
Hence, a has unique multiplicative inverse.
Answer:
19
Step-by-step explanation:
5x8 is 40
59-40 is 19
Answer:
26
Step-by-step explanation:
Pretty sure it’s 4 idk tho this is a tough one. Hahahaha