Risposta:
# 2 / (x ^ 2-9) + 3 / (x ^ 2-4x + 3) = (5x + 7) / ((x-3) (x + 3) (x-1)) #
Spiegazione:
# 2 / (x ^ 2-9) + 3 / (x ^ 2-4x + 3) #
= # 2 / ((x-3) (x + 3)) + 3 / ((x-3) (x-1)) #
= # (2 (x-1) 3 (x + 3)) / ((x-3) (x + 3) (x-1)) #
= # (2x-3x + 2 + 9) / ((x-3) (x + 3) (x-1)) #
= # (5x + 7) / ((x-3) (x + 3) (x-1)) #
