Question

please solve this question it is very urgent ​

Answer 1

Step-by-step explanation:

x² + 1/x² = 18

x² + 1/x² -2 + 2 = 18

(x - 1/x)² + 2 = 18

(x - 1/x)² = 16

x - 1/x = 4

cube karne per

(x - 1/x)³ = 64

x³ - 1/x³ - 3(x)(1/x)(x-1/x) = 64

x³ - 1/x³ - 3 (4) = 64

x³ - 1/x³ - 12 = 64

x³ - 1/x³ = 76