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Question

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The square root of ((10 + √25)(12 – √49)) is:

  1. 4√3 
  2. 3√3
  3. 5√3
  4. 2√3

Answer (Detailed Solution Below)

Option 3 : 5√3
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Detailed Solution

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Concept:

We can find √x using the factorisation method.

Calculation:

√[(10 + √25) (12 - √49)]

⇒ √[(10 + 5)(12 – 7)]

⇒ √(15 × 5)

⇒ √(3 × 5 × 5)

⇒ 5√3

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