Step-by-step explanation:
(10n² − 250) / (3n + 15)
Factor 10 from the numerator, and 3 from the denominator.
10 (n² − 25) / (3 (n + 5))
Factor the difference of squares:
10 (n − 5) (n + 5) / (3 (n + 5))
Divide n + 5 from the top and bottom:
10 (n − 5) / 3
