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    Question

    Simplify the following expression. (3x+5)² +

    (3x–5)²
    A 500x Correct Answer Incorrect Answer
    B 450x Correct Answer Incorrect Answer
    C 9x² + 50 Correct Answer Incorrect Answer
    D 2(9x²+25) Correct Answer Incorrect Answer

    Solution

    (3x+5) ² + (3x–5)² =9x2+25+30x +9x2+25-30x =2(9x2+25)

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