8. Factorisation of x3 + 1 is (a) (x + 1)(x2 – x + 1) (b) (x + 1)(x2 + x + 1) (c) (x + 1)(x2 – x – 1) (d) (x + 1)(x2 + 1)
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Answer:
(x+1)(x²-x+1) is a factorisation of x³+1
Step-by-step explanation:
(x+1)(x²-x+1)=x³-x²+x+x²-x+1
=x³+1
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