make the equation equal to 0 first, we get
find a value for x for which the equation is true. that is find a value for x for which the RHS is 0. say
then is a factor of the RHS. divide by this factor and you will get an expression to the third power for x. repeat above steps, and get another expression to the second power for x, then you can factorize it all.
if the equation has all real roots, you will get something like this:
a,b,c,d, then are the roots of the equation
I hope i am clear enough