Answer:
Yes
Answer:    x = 0
Step-by-step explanation:
Yes it is. 
Down is the answer how to solve this equation and the steps.
Step  1  :
Equation at the end of step  1  :
  qx -  (((4 • (x2)) -  3x3) +  8x)  = 0  
 Step  2  :
Equation at the end of step  2  :
  qx -  ((22x2 -  3x3) +  8x)  = 0  
Step  3  :
Step  4  :
Pulling out like terms :
 4.1     Pull out like factors :
   qx + 3x3 - 4x2 - 8x  =  
  x • (q + 3x2 - 4x - 8)  
Equation at the end of step  4  :
  x • (q + 3x2 - 4x - 8)  = 0  
Step  5  :
Theory - Roots of a product :
 5.1    A product of several terms equals zero.  
 When a product of two or more terms equals zero, then at least one of the terms must be zero.  
 We shall now solve each term = 0 separately  
 In other words, we are going to solve as many equations as there are terms in the product  
 Any solution of term = 0 solves product = 0 as well.
Solving a Single Variable Equation :
 5.2      Solve  :    x = 0  
  Solution is  x = 0
Solving a Single Variable Equation :
 5.3     Solve   q+3x2-4x-8  = 0
In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.
Answer:  x = 0
Hope this helps.