Answer:
20 x 57^x / 10^x
Step-by-step explanation:
c^ 2 = a^2 + b^2
given a = 2 and b = 5
so
c^2 = 2^2 + 5^2
or
2^2 + 5^2 = c^2
answer is the first one
11x
u just add them regularly
