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21=3r squared how do I solve that?
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5 votes
21=3r squared how do I solve that?

User Rodrigo Estebanez
by
8.8k points

1 Answer

6 votes

Answer:

±sqrt(7) = r

Explanation:

21 = 3r^2

Divide each side by 3

21/3 = 3r^2/3

7 = r^2

Take the square root of each side

±sqrt(7) = sqrt(r^2)

±sqrt(7) = r

User Hari M
by
8.0k points
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