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    5. What is the square root of the following? (x² –14x+49) (x² + 6x + 9)

    Question

    What is the square root of the following? (x²

    –14x+49) (x² + 6x + 9)
    A (x–4) (x+9) Correct Answer Incorrect Answer
    B (x–7) (x+3) Correct Answer Incorrect Answer
    C (x–1) (x+17) Correct Answer Incorrect Answer
    D (x–3) (x+8) Correct Answer Incorrect Answer

    Solution

    (x² –14x+49) = (x² –7x-7x+49) =x(x-7)-7(x-7) =(x-7) (x-7) (x² + 6x + 9) (x² + 3x+3x+9 =x(x+3) +3(x+3) =(x+3) (x+3) =(x-7) (x+3)

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