A [tex]\sqrt{256:16} i \sqrt{256}:\sqrt{16} \\ =\sqrt{16}i 16:4\\=4 i 4 \\ \sqrt{256:16} = \sqrt{256}:\sqrt{16}[/tex]
B[tex]\sqrt{16*25}i\sqrt{16}*\sqrt{25} \\4*5 i 4*5 \\20i 20\\\sqrt{16*25}=\sqrt{16}*\sqrt{25}[/tex]
C[tex]\sqrt{289} -\sqrt{64}i\sqrt{289-64}\\=17-8i\sqrt{225}\\=9i15\\\sqrt{289} -\sqrt{64} < \sqrt{289-64}[/tex]
D[tex]\sqrt{400}+ \sqrt{255}i\sqrt{400+255}\\ =20+15i\sqrt{625}\\ =35i25\\\sqrt{400}+ \sqrt{255} > \sqrt{400+255}[/tex]
