If x is real, x + 1 ≠ 0 and x3 + 1 = 0 , then the value

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Using Rule 8

	x +	1		³	= x³ +	1	+ 3		x +	1
		x				x³				x

= 3		x +	1
			x

⇒		x +	1		²	= 3
			x

∴		x +	1		⁴	= 3 × 3 = 9
			x

If x is real, x +	1	≠ 0 and x³ +		1	= 0 , then the value of		x +	1		⁴	is
	x			x³				x