Question

if x-1/x is equal to 5 ,then x4+1/x4 is​

Answer 1

Answer:

x-1/x = 5

(x-1/x)² = x²+1/x²-2

(5)² = x²+1/x²-2

25+2 = x²+1/x² => 27

(x²+1/x²)² = x⁴+1/x⁴+2

(27)² = x⁴+1/x⁴+2

729-2 = x⁴+1/x⁴

727 = x⁴+1/x⁴