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5x^3 + 15 x^2 - 125x - 375 = 5(x^3 + 3 x^2 - 25x - 75) = 5[(x^3 + 3 x^2) - (25x + 75)] = 5[x^2(x + 3) - 25(x + 3)] = 5[(x + 3)(x^2 - 25)] = 5(x + 3)(x + 5)(x -5)

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15y ago
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Q: What does 5x3 plus 15x2 - 125x - 375 factor to?
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