[tex]4\sqrt{25}\cdot\sqrt{5} = 4\cdot5\cdot\sqrt{5} = 20\sqrt{5}[/tex]
Wyjaśnienie:
[tex]\sqrt{25} = 5[/tex]
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[tex]4\sqrt{25}\cdot\sqrt{5} = 4\cdot5\cdot\sqrt{5} = 20\sqrt{5}[/tex]
Wyjaśnienie:
[tex]\sqrt{25} = 5[/tex]