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Question

The value of $8^{2} +   \sqrt{ 3^{2} } -2 \sqrt{36} -11$ is

The correct answer is
44

Evaluate Math Expression: $8^{2} + \sqrt{ 3^{2} } - 2\sqrt{36} -11$

This problem requires us to simplify a mathematical expression involving powers and square roots. We need to calculate the value of $8^{2} + \sqrt{ 3^{2} } - 2\sqrt{36} -11$. Let's break down each part of the expression.

Step-by-Step Calculation

We will evaluate each term individually before combining them:

  1. Calculate the power: $8^{2}$ means $8 \times 8$. $8^{2} = 64$
  2. Calculate the square root of a square: $\sqrt{ 3^{2} }$ is the square root of $3 \times 3$, which is $\sqrt{9}$. The square root of 9 is 3. $\sqrt{ 3^{2} } = \sqrt{9} = 3$
  3. Calculate the square root: $\sqrt{36}$ is the number which, when multiplied by itself, equals 36. That number is 6. $\sqrt{36} = 6$
  4. Multiply the square root result: We need to calculate $2 \times \sqrt{36}$. Since $\sqrt{36} = 6$, this becomes: $2\sqrt{36} = 2 \times 6 = 12$

Combine the Terms

Now substitute the calculated values back into the original expression:

$8^{2} + \sqrt{ 3^{2} } - 2\sqrt{36} -11 = 64 + 3 - 12 - 11$

Perform the addition and subtraction from left to right:

  • First, add $64 + 3$: $64 + 3 = 67$
  • Next, subtract 12 from the result: $67 - 12 = 55$
  • Finally, subtract 11 from the result: $55 - 11 = 44$

Therefore, the value of the expression $8^{2} + \sqrt{ 3^{2} } - 2\sqrt{36} -11$ is 44.

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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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