Question 185862
(9x2-15x+25)/(27x3+125)
.
27x^3+125
=(3x)^3+5^3 Factor
=(3x+5)(9x^2-15x+25) Factor sum of two cubes.
.
(9x^2-15x+25)/[(3x+5)(9x^2-15x+25)]
=1/(3x+5)
.
Ed