Объяснение:

[tex]1. \sqrt{25 \times 81} = \sqrt{25} \times \sqrt{81} = 5 \times 9 = 45 \\ 2. \sqrt{36 \times 144} = \sqrt{36} \times \sqrt{144} = 6 \times 12 = 72 \\ 3. \sqrt{0.09 \times 49} = \sqrt{0.09} \times \sqrt{49} = 0.3 \times 7 = 2.1 \\ 4. \sqrt{3.24 \times 0.25} = \sqrt{3.24} \times \sqrt{0.25 } = 1.8 \times 0.5 = 0.9 \\ 5. \sqrt{9 \times 16 \times 25} = \sqrt{9} \times \sqrt{16} \times \sqrt{25} = 3 \times 4 \times 5 = 60 \\ 6. \sqrt{64 \times 0.04 \times 225} = \sqrt{64} \times \sqrt{0.04 } \times \sqrt{225} = 8 \times 0.2 \times 15 = 24[/tex]