The value of the given equation is 124.
Calculation of the a value:
Since the equation is [tex]2a^3 - a[/tex] and a = 4
So, the value of a is
[tex]= 2a^3 - a\\\\= 2(4)^3 - 4\\\\= 128 - 4[/tex]
= 124
Hence, The value of the given equation is 124.
Learn more about the value here: https://brainly.com/question/4700495
