2023 KSS P1 Q5

2023 KSS P1 Q5

Secondary 4

4 marks

Factorise \(x^3-8\) and explain why \(x=2\) is the only real root of the equation \(x^3-8=0\).[4]

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Answer:\((x-2)(x^2+2x+4)\); the quadratic has negative discriminant.

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