回答:
(x + 2)
説明:
#f(x)=(a / b)/(c / d)#
xのすべての関数を因数分解します。
1. #a = 3x ^ 2 - 7x -6 =# (3x + 2)(x - 3)
2. #b = x ^ 3 - 3x ^ 2 + 4x - 12 =(x - 3)(x ^ 2 + 4)#
3. #c = 3x ^ 2 - 4x - 4 =# (3x + 2)(x - 2)
4. #d = x ^ 4 - 16 =(x ^ 2 + 4)(x - 2)(x + 2)#
#f(x)= (3x + 2)(x - 3) / (x - 3)(x ^ 2 + 4) (x ^ 2 + 4)(x - 2)(x + 2 ) / (3x + 2)(x - 2)#
f(x)=(x + 2)