Question

Using prime factorisation method, find the square root of the following, if possible (a) 441 (c) 2048

Answer 1

(a) `441 = 3 xx 3 xx 7 xx7`
`sqrt 441 = 3 xx 7`
`= 21`
(b) `2048 = 2 xx 2 xx 2 xx 2 xx 2 xx 2 xx 2 xx 2 xx 2 xx 2 xx 2 `
`sqrt 2048 !=` not prime number
Answer