Solve a² +15x+12=0 (mod 19). For the purpose of practice, you must use three different methods.

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Q: Solve x² +15x+12 = 0 (mod 19). For the purpose of practice, you must use three different methods.

A: We begin by completing the square to get the equation into a more manageable form: x² + 15x + 12 = 0…

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