Answers

2015-08-16T10:43:54+08:00
Transforming each root to its factor: [x(x+4)(x+5)(x^2 - 1)] = [(x^2 - 1)(x^2 + 9x + 20)(x)] = x^5 + 9x^4 + 19x^3 - 9x^2 - 20x
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