Given:
[tex]x^4-16[/tex]Required:
To factor the given expression.
Explanation:
Consider the given expression
[tex]x^4-16[/tex]Now
[tex]\begin{gathered} x^4-16=(x^2)^2-(4^)^2 \\ \\ =(x^2-4)(x^2+4) \\ \\ =(x^2-2^2)(x^2+4) \\ \\ =(x-2)(x+2)(x^2+4) \end{gathered}[/tex]Final Answer:
[tex]x^4-16=(x-2)(x+2)(x^2+4)[/tex]