Answer:
[tex]x^3 (4x^2 - \sqrt{5})(4x^2 + \sqrt{5} )[/tex]
Step-by-step explanation:
Factor the expression starting with a GCF. x^3 is the GCF of both terms.
[tex]16x^5 - 5x^3\\x^3 ( 16x^2 - 5)[/tex]
To factor further, factor as a difference of squares.
[tex]x^3 (4x^2 - \sqrt{5})(4x^2 + \sqrt{5} )[/tex]