Question

how do i simplify the square root of 84

Answer 1

the square root of a number N is a number which when multiplied by itself gives N.

if you find the prime factors of 81 the square root will be apparent:

81 = 3*3*3*3

Answer 2

i meant 84

Answer 3

but i think the answer is 2 sq root of 42 that is one of the answer choices

Answer 4

oh ok
well factor 84 and look for perfect squares

84 = 2*2*3*7

= 4* 21
squareroot of 4 = 2

answer is 2 sqrt21

Answer 5

yes

Answer 6

thank you

Answer 7

you simplify it by simplifying