1) (2√3)² = 2² · (√3)² = 4 · 3 = 12;
2) √3 · √18 = √3 · 3√2 = 3√6;
3)
4) 2√13 · √2 · 5√26 = 10 · √26 · √26 = 10 · 26 = 260.
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Answers & Comments
1) (2√3)² = 2² · (√3)² = 4 · 3 = 12;
2) √3 · √18 = √3 · 3√2 = 3√6;
3)
4) 2√13 · √2 · 5√26 = 10 · √26 · √26 = 10 · 26 = 260.