a)
[tex] \sqrt{4 \times 25} = \sqrt{4} \times \sqrt{25} = 2 \times 5 = 10[/tex]
b)
[tex] \sqrt{36 \times 9} = \sqrt{36} \times \sqrt{9} = 6 \times 3 = 18[/tex]
c)
[tex] \sqrt{81 \times 49} = \sqrt{81} \times \sqrt{49} = 9 \times 7 = 63[/tex]
d)
[tex] \sqrt{100 \times 49} = \sqrt{100} \times \sqrt{49} = 10 \times 7 = 70[/tex]
e)
[tex] \sqrt{64 \times 225} = \sqrt{64} \times \sqrt{225} = 8 \times 15 = 120[/tex]
f)
[tex] \sqrt{81 \times 400} = \sqrt{81} \times \sqrt{400} = 9 \times 20 = 180[/tex]
g)
[tex] \sqrt{144 \times 0.25} = \sqrt{144} \times \sqrt{ \frac{25}{100} } = 12 \times \frac{5}{10} = 6[/tex]
h)
[tex] \sqrt{1.21 \times 0.04} = \sqrt{ \frac{121}{100} } \times \sqrt{ \frac{4}{100} } = \frac{11}{10} \times \frac{2}{10} = \frac{11}{5} \times \frac{1}{10} = \frac{11}{50} [/tex]
sper ca ajutaaa
