Răspuns:
a)
28 = 2^2 × 7
180 = 2^2 × 3^2 × 5
147 = 3 × 7^2
b)
[tex] \sqrt{28} = 2 \sqrt{7} [/tex]
[tex] \sqrt{180} = 6 \sqrt{5} [/tex]
[tex] \sqrt{147} = 7 \sqrt{3} [/tex]
