(X-6) (x + 7) / (x-9), (x + 5)?

(X-6) (x + 7) / (x-9), (x + 5)?
Anonim

odpoveď:

# = (X ^ 2 + x-42) / (x ^ 2-4x-45 #

vysvetlenie:

# ((X-6), (x + 7)) / ((x-9), (x + 5)) #

Použite distribučnú vlastnosť

# = ((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 #