Question

if x^2+4/x^2=5, then evaluate (x^3+8/x^3)
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Answer 1

Answer:

x^2+4/x^2=5

x^2+4= 5x^2

4 = 5x^2 - x^2

4 x^2 = 4

x^2 = 1

x = 1

a/q

(x^3+8/x^3)

= (1)^3+8/(x)^3

=1+8/1

=9/1

=9

hope it helps you