Algebrahard · Past Paper
What is the HCF of x^3 - 1 and x^2 + x + 1?
Ax - 1
Bx^2 + x + 1
Cx + 1
D1
✓ Correct Answer: B — x^2 + x + 1
x^3 - 1 = (x - 1)(x^2 + x + 1). The second expression is already x^2 + x + 1. The HCF is x^2 + x + 1.
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