Question

1
If x2 – X-1 = 0, find the value of x8​

Answer 1

Step-by-step explanation:

x²-x-1=0

x²=x+1

(x²)² = (x+1)²

x⁴=x²+2x+1

(x⁴)²=(x²+2x+1)²

x⁸=x⁴+4x²+1+4x³+4x+2x²

x⁸=x⁴+4x³+6x²+4x+1

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