Question

calculați -3√162+5√200-3√102+3√432

Answer 1

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Answer 2

$- 3 \sqrt{162} + 5 \sqrt{200} - 3 \sqrt{102} + 3 \sqrt{432} = \\ \\ - 3 \times 9 \sqrt{2} + 5 \times 10 \sqrt{2} - 3 \sqrt{102} + 3 \times 12 \sqrt{3} = \\ \\ - 27 \sqrt{2} + 50 \sqrt{2} - 3 \sqrt{102} + 36 \sqrt{3} = \\ \\ ( - 27 \sqrt{2} + 50 \sqrt{2}) - 3 \sqrt{102} + 36 \sqrt{3} = \\ \\ 23 \sqrt{2} - 3 \sqrt{102} + 36 \sqrt{3}$