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    Question

    The value of [(3√2+2) × (3√2-2)] of 13

    + 20 is:
    A 616 Correct Answer Incorrect Answer
    B 202 Correct Answer Incorrect Answer
    C 140 Correct Answer Incorrect Answer
    D 414 Correct Answer Incorrect Answer

    Solution

    Formula used: (a - b)(a + b) = a2 - b2 = [(3√2 + 2) × (3√2 - 2)] of 13 + 20 [(3√2)2 - (2)2] × 13 + 20 [18 - 4] × 13 + 20 14 × 13 + 20 202 ∴ The required result = 202

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