Question

What is the exact value for the expression the square root of 189. - the square root of 21. + the square root of 84.? Simplify if possible.

the square root of 21.

6 the square root of 7.

4 the square root of 21.

24 the square root of 7.

Answer 1

look at 189, 21 and 84, what is the largest common factor? that is the biggest number that can divide those 3 nos.

Answer 2

oh okay, I got the answer.

Answer 3

good job! so what is the ans? just wanna be sure u got it :)

Answer 4

C

Answer 5

Correct! u all set now :)