[tex] \sqrt{18} = \sqrt{9 \times 2} = 3 \sqrt{2} [/tex]
[tex] \sqrt{6} \times \sqrt{3} = \sqrt{18} = \sqrt{9 \times 2} = 3 \sqrt{2} [/tex]
[tex] \frac{2}{3} \sqrt{18} = \sqrt{18 \times \frac{4}{9} } = \sqrt{2 \times 4} = \sqrt{8} = \sqrt{4 \times 2} = 2 \sqrt{2} [/tex]
[tex] \sqrt{27} - \sqrt{3} = \sqrt{9 \times 3} - \sqrt{3} = 3 \sqrt{3} - \sqrt{3} = 2 \sqrt{3} [/tex]
odp. D
