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Question

\(\sqrt{29.8116}+\sqrt{77.44}=\)

The correct answer is

14.26

Solving the Square Root Sum Equation

This problem requires us to find the sum of two square roots: $ \sqrt{29.8116} $ and $ \sqrt{77.44} $. We will calculate each square root separately and then add them together.

Step 1: Calculate the Square Root of 29.8116

We need to find the value of $ \sqrt{29.8116} $. Let's determine this value.

  • We can estimate the value: $ 5^2 = 25 $ and $ 6^2 = 36 $. So, the square root is between 5 and 6.
  • Testing values, we find that $ 5.46 \times 5.46 = 29.8116 $.

Therefore, $ \sqrt{29.8116} = 5.46 $.

Step 2: Calculate the Square Root of 77.44

Next, we need to find the value of $ \sqrt{77.44} $.

  • We can estimate this value: $ 8^2 = 64 $ and $ 9^2 = 81 $. So, the square root is between 8 and 9.
  • Testing values, we find that $ 8.8 \times 8.8 = 77.44 $.

Therefore, $ \sqrt{77.44} = 8.8 $.

Step 3: Sum the Calculated Square Roots

Now, we add the results from Step 1 and Step 2:

Sum = $ \sqrt{29.8116} + \sqrt{77.44} $

Sum = $ 5.46 + 8.8 $

Sum = $ 14.26 $

Step 4: Match the Result with the Options

The calculated sum is $ 14.26 $. Comparing this value with the given options:

  • Option 1: 12.62
  • Option 2: 12.26
  • Option 3: 14.26
  • Option 4: 14.62

Our calculated result $ 14.26 $ matches Option 3.

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Important Questions from Surds and Indices

  1. The value of (0.3) [{(200 - 146)/(3 × 3 × 3)} - 3] is:

  2. The expression \(\frac{{15\left( {\sqrt {10} + \sqrt 5 } \right)}}{{\sqrt {10\;} + \sqrt {20} + \sqrt {40} - \sqrt 5 - \sqrt {80} }}\)  is equal to:

  3. Let \(x = \left( {\frac{{√ {1875} }}{{√ {3888} }} \div \frac{{√ {1200} }}{{\sqrt 768}}} \right) \times \frac{{√ {175} }}{{√ {1792} }}\) . Then √x is equal to:

  4. If \(x = \sqrt {-\sqrt 3 + \sqrt {3 + 8\sqrt {7 + 4\sqrt 3}}}\)  where x > 0, then the value of x is equal to:

  5. What is the value of \(\frac{\sqrt{7}+\sqrt{5}}{\sqrt{7}−\sqrt{5}} \div \frac{\sqrt{14}+\sqrt{10}}{\sqrt{14}−\sqrt{10}}+\frac{\sqrt{10}}{\sqrt{5}}\) ?

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