Explicație pas cu pas:
a)
[tex]2 \sqrt{5} = \sqrt{ {2}^{2}\times 5} = \sqrt{20} \\ 3 \sqrt{2} = \sqrt{ {3}^{2} \times 2} = \sqrt{18} \\ \sqrt{20} > \sqrt{18} = > 2 \sqrt{5} > 3 \sqrt{2} [/tex]
b)
[tex]4 \sqrt{3} = \sqrt{ {4}^{2} \times 3} = \sqrt{48} \\ 7 = \sqrt{ {7}^{2} } = \sqrt{49} \\ \sqrt{48} < \sqrt{49} \\ = > 4 \sqrt{3} < 7[/tex]
c)
[tex]\sqrt{5} = \sqrt{5} \: si \: 5 < 6 \\ = > 5 \sqrt{5} < 6 \sqrt{5} \\ [/tex]
d)
[tex]1.2(3) = \frac{123 - 12}{90} = \frac{111}{90} = \frac{37}{30} \\ = > 1.2(3) = \frac{37}{30} [/tex]
