Question

anyone know the answer

Answer 1

it’s the fourth answer.

Answer 2

For this case we have the following expression:
 root (b) * root (b)
 Rewriting we have:
 root (b * b)
 Then, for power properties:
 root (b ^ 2)
 Finally, we have:
 root (b ^ 2) = b
 Answer:
 The equivalent expression is given by:
 b
 option 3