Answer:
10
Step-by-step explanation:
the lowest number that 5 and 2 go into is 10 a quick way to find LCD is just to multiply the denominators and that just see if there is any smaller numbers
i hope these 3 images helps
A, B
√(2^4+3^2)
√(16+9)
√25
5(Option A)
√(10^2-2^5)
√(100-64)
√36
6(Option B)
Check the picture below.