Simplify and state any non-permissible values. Please show all factoring and cancelling.
(3x^2-x)/(6x^2+15x)÷(6x^2+x-1)/(2x^2-5x-25)
x(3x-1) / 3x(2x+5) ÷ (3x-1)(2x+1) / (2x+5)(x-5)
(3x-1) / 3(2x+5) * (2x+5)(x-5) / (3x-1)(2x+1)
1 / 3 * (x-5) / (2x+1)
(x-5) / 3(2x+1)
from the original expression, exclude 0, -5/2, 1/3, 5
from the final value, exclude -1/2