Which of the following is a polynomial with roots - square root of 5, square root of 5, and -3 ? x3 - 2x2 - 3x + 6, x3 + 2x2 - 3x - 6, x3 - 3x2 - 5x + 15, or x3 + 3x2 - 5x - 15?

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x^3 -2.25x^2+2.25x^2-3x2-2.25x+2.25x-3x-15

simplified, it's x^3-3x^2-3x-15, right?

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