Respuesta :

8)
[tex] \sqrt{40} [/tex]
[tex] \sqrt{4*10} [/tex]
The 4 is a squared number (2×2).
Answer: [tex] 2\sqrt{10} [/tex]
12)
[tex] \sqrt{441} [/tex]
The 441 is a squared number (21×21)
Answer: 21