The given phrase isn't a direct block of code in...

The given phrase isn't a direct block of code in standard programming languages. However, interpreting it as a task that a code attempting to "factor completely" a quadratic expression would perform:

The expression described in plain text is:
(-20z^2 + 44z + 48).

A typical algorithm or function in code designed to handle this would process it as follows:

1. Factor out the greatest common factor (GCF), if any.
   The GCF of (-20z^2 + 44z + 48) is (4). Factoring that out:
   (4(-5z^2 + 11z + 12)).

2. Factorize the quadratic expression (-5z^2 + 11z + 12):
   Use methods like trial and error, splitting the middle term, or other techniques:
   ((-5z^2 + 11z + 12)) factors into:
   ((-5z - 4)(z - 3)).

3. Combine the factors to express the complete factorization:
   (4(-5z - 4)(z - 3)).

So, the result of factoring the expression (-20z^2 + 44z + 48) completely is:
[ 4(-5z - 4)(z - 3) ]