159k views
5 votes
21=3r squared how do I solve that?

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
6.6k points