Factorise x^4 + x^2 + 1

Answer: x⁴+ x² + 1 = (x²+ 1 − x)(x²+ 1 + x)

x⁴+ x² + 1

= (x²)²+ 2 (x²) (1) + 1²− x²

= (x²+ 1)²− x²

= (x²+ 1 − x)(x²+ 1 + x)

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Factorise x⁴ + x² + 1