Antworten:
# = (x ^ 2 + x-42) / (x ^ 2-4x-45 #
Erläuterung:
# ((x-6) (x + 7)) / ((x-9) (x + 5)) #
Verwenden Sie die distributive Eigenschaft
# = ((x) (x) + (x) (7) + (- 6) (x) + (- 6) (7)) / ((x) (x) + (x) (5) + (-9) (x) + (- 9) (5) #
# = (x ^ 2 + 7x-6x-42) / (x ^ 2 + 5x-9x-45) #
# = (x ^ 2 + x-42) / (x ^ 2-4x-45 #
# = (x ^ 2 + x-42) / (x ^ 2-4x - 45 #
