3v^3-192
factor completely
ok that's ok this is problem. i need help you
firstt this you the the number 192 you can you use calculator to see $\displaystyle 192=3*4^3$
and change this into the $\displaystyle 3v^3-192$so you have $\displaystyle 3v^3- 3*4^3$$\displaystyle \Longrightarrow 3(v^3-4^3)$
remember you have
so $\displaystyle a=v, b=4$
yoou can find this when you change into the