RomanHC RomanHC
  • 03-07-2020
  • Mathematics
contestada

Simplify this radical.
V84
2/21
242
4/21
4/42

Respuesta :

Space
Space Space
  • 03-07-2020

Answer:

2√21

Step-by-step explanation:

√81 is √4 times √21

Since √4 is a perfect square, √4 = 2

We are left with 2 times √21

2√21

Answer Link
09pqr4sT
09pqr4sT 09pqr4sT
  • 03-07-2020

Answer:

2√21

Step-by-step explanation:

√84

84 can be written as 4 × 21.

√(4 × 21)

Distribute the square root to both terms.

√4 × √21

4 is a perfect square.

2 × √21

Answer Link

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