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Combine and simplify these radicals.8⋅20\sqrt{8}\cdot\sqrt{20}8​⋅20​.

Question

Combine and simplify these radicals.

8 ⋅ 20√8 ⋅ √20

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Solution

To combine and simplify the given radicals, follow these steps:

Step 1: Define the Problem

Identify the expression that needs simplification: 8820820 8 \cdot \sqrt{8} \cdot \sqrt{20} \cdot 8 \cdot 20 .

Step 2: Break Down the Problem

Divide the expression into manageable parts:

  • Simplify the radicals: 8 \sqrt{8} and 20 \sqrt{20} .
  • Simplify the multiplication of constants: 8820 8 \cdot 8 \cdot 20 .

Step 3: Apply Relevant Concepts

  1. Simplify the radicals:

    • 8=42=22 \sqrt{8} = \sqrt{4 \cdot 2} = 2\sqrt{2}
    • 20=45=25 \sqrt{20} = \sqrt{4 \cdot 5} = 2\sqrt{5}
  2. Multiply the simplified radicals:

    • 820=(22)(25)=410 \sqrt{8} \cdot \sqrt{20} = (2\sqrt{2}) \cdot (2\sqrt{5}) = 4\sqrt{10}
  3. Simplify the multiplication of constants:

    • 8820=1280 8 \cdot 8 \cdot 20 = 1280

Step 4: Analysis, Verify and Summarize

Combine the simplified parts:

  • Multiply the constant with the simplified radical:
    • 1280410=512010 1280 \cdot 4\sqrt{10} = 5120\sqrt{10}

Final Answer

The simplified form of the expression is 512010 5120\sqrt{10} .

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