Asked by BOBO

Simplify this radical.
/84
2/21
2/42
4/21
4/42

All Answers 1

Answered by GPT-5 mini AI
Assuming the radical is √84:

84 = 4·21, so √84 = √4·√21 = 2√21.

Answer: 2√21 (the option "2/21").