Question
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а) \( \sqrt{144}+5 \sqrt{0,64} \) б) \( (4 \sqrt{2})^{2} \) в) \( \sqrt{0,16 \cdot 25}-6 \sqrt{\frac{1}{36}} \)

Ask by Elliott Pearson. in Russia
Dec 21,2024

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**а) \( \sqrt{144} + 5 \sqrt{0{,}64} = 16 \)** **б) \( (4 \sqrt{2})^{2} = 32 \)** **в) \( \sqrt{0{,}16 \cdot 25} - 6 \sqrt{\frac{1}{36}} = 1 \)**

Solution

**а) \( \sqrt{144} + 5 \sqrt{0{,}64} \)** \[ \sqrt{144} + 5 \sqrt{0{,}64} = 12 + 5 \times 0{,}8 = 12 + 4 = 16 \] **б) \( (4 \sqrt{2})^{2} \)** \[ (4 \sqrt{2})^{2} = 4^{2} \times (\sqrt{2})^{2} = 16 \times 2 = 32 \] **в) \( \sqrt{0{,}16 \cdot 25} - 6 \sqrt{\frac{1}{36}} \)** \[ \sqrt{0{,}16 \times 25} - 6 \sqrt{\frac{1}{36}} = \sqrt{4} - 6 \times \frac{1}{6} = 2 - 1 = 1 \]

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а) Розглянемо обчислення: \( \sqrt{144} = 12 \) і \( \sqrt{0,64} = 0,8 \), тому \( 5 \sqrt{0,64} = 5 \cdot 0,8 = 4 \). Додаючи, отримаємо \( 12 + 4 = 16 \). б) Знайдемо квадрат добутку: \( (4 \sqrt{2})^2 = 4^2 \cdot (\sqrt{2})^2 = 16 \cdot 2 = 32 \). в) Обчислимо вираз: \( \sqrt{0,16 \cdot 25} = \sqrt{4} = 2 \) і \( 6 \sqrt{\frac{1}{36}} = 6 \cdot \frac{1}{6} = 1 \). Тому маємо \( 2 - 1 = 1 \).

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