Question

x+1/x=✓29 then the value of x^3-1/x^3

Answer 1

Step-by-step explanation:

x+1/x = 3

Cubing both sides

(x+1/x)^3 = 3^3

Now, using the formula ( a+b)^3

x^3 + 1/x^3 + 3× x × 1/x ( x+ 1/x) = 27

x^3 + 1/x^3 + 3 (x+1/x) = 27

A/q: x+ 1/x = 3

x^3 + 1/x^3 + 3 (3) = 27

x^3 + 1/x^3 = 27-9

x^3 + 1/x^3 = 18

Answer 2

Answer:

x+1/x=√29

x^3+1/x^3

=(x+1/x)^3-3.x.1/x(x+1/x)

=(√29)^3-3√29

=√29.√29.√29-3√29

=29√29-3√29

=26√29