Question

What is the geometric mean of 3 and 21?

Answer 1

3/x = x/21

or

x^2 = 3(21)

or

x^2 = 63

or

x = sqrt(63)

Do we need to simplify the radical?

Answer 2

sqrt ( 3*21)

Answer 3

Its a multiple choice question It gives 3 radical 7 ; 7 radical 3; 31.5 ;63

Answer 4

x = sqrt (9 * 7)

or

\[x = 3\sqrt{7}\]

Answer 5

Do you understand or just need the answer?

Answer 6

no i wasnt sure how to get the answer

Answer 7

okay so we need to simplify radicals. This might come in handy later ...

Answer 8

okay