This is because of there different marketing statargies plus the reason behind this can be because they have high stock left and they want to clear that
Simplify it to 2x-4=8x-4
-6x=0
x=0
not sure if that counts as no solution or single solution though...
There are two things you should do right away
Divide through by minus 3
Substitute another letter (say z) for x^2
Step One
-3x^4/-3 +27x^2/-3 + 1200/-3 = 0/-3
x^4 - 9x^2 - 400 = 0
Step 2
Let z = x^2
(x^2)^2 - 9(x^2) - 400 = 0
z^2 - 9z^2 - 400 = 0
Step 3
By factoring solve for z
(z - 25)(z + 16) = 0
z = 25
x^2 = 25
x = +/- 5
============
z + 16 = 0
z = - 16
x^2 = - 16
x = sqrt(-16)
x = +/- 4i
I've included a graph to show that the zeros are correct.