exam Maths Puzzle Numerical Ability

Factor completely: x^3 - 2x^2 - 4x - 8

I have come up with varying answers for this problem, so am probably not working it correctly. Could you please show me the steps involve

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Please help me find a quadratic function with solutions -5+2i and -5-2i and a leading coefficient of 1.sum of root=-10 products of roots =27 x^2+10x+27 Science and technology. Fungicides account for 1/10 of the pesticides used in the United States. Insecticides account for 1/4 of all the pesticides used in the United States. The r