Answer:
Step-by-step explanation:
f(x) = (x + 3)(x + 12)
f(x) = x^2 + 3x + 12x + 36
f(x) = x^2 + 15x + 36
The ratio of 25/35 is
25/35
=5/7 (both cut by 5)
So, your answer is 5:7