A quadratic equation has roots 3 and 5. What is the quadratic equation in standard form?

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A. x² - 8x + 15 = 0

B. x² + 8x + 15 = 0

C. x² - 15x + 8 = 0

D. x² + 15x - 8 = 0

E. None of the above

Answer: A. x² - 8x + 15 = 0

The quadratic equation can be formed using the roots: (x - 3)(x - 5) = 0, which expands to x² - 8x + 15 = 0.

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