Answer:
Given the equation: 
rewrite the above equation as: 
Like terms are those whose variables are same.
Combine like terms :
 ....[1]
 ....[1]
Now, to solve the above quadratic equation:
For quadratic equation:  where a,b, and c are constant.
 where a,b, and c are constant.
then the solutions are:  
 ...[2]
              ...[2]
in equation [1], the values of a= 4, b=-10 and c= -24.
then, by putting these in the [2] we get, 

On solving we get,  the solutions are:
 and
 and 
Check :
By substituting the values of x= -1.5 and x=4 in equation   we have;
 we have;
for x=-1.5



9+10.5=19.5
19.5=19.
Similarly, for x=4



64-28=36
36=36
Therefore, the only solution of the equation   is, x= -1.5 and x=4
  is, x= -1.5 and x=4