Answer:
The answer is
( x - 4)( x + 16)
Explanation:
x² + 12x - 64
To factorize the expression write 12x as a difference
That's
x² + 16x - 4x - 64
Factor out x from the expression
That's
x( x + 16) - 4x - 64
Factor out - 4 from the expression
That's
x( x + 16) - 4 ( x + 16)
Factor out (x + 16) from the expression
We have the final answer as
( x - 4)( x + 16)
Hope this helps you