The square root pf a number can be simplified only if the number is divisible by a perfect square (other than 1). √ 12 can be simplified because 12 is divisible by 4 -- a perfect square. √ 12 = √ 4 × 3 = √ 4 × √ 3 = 2 √ 3 √ 250 can be simplified because 250 is divisible by 25
√ 250 = √ 25 × 10 = √ 25 × √ 10 = 5 √ 10 But 6 is not divisible by a perfect square, so √ 6 cannt be simpified further.