Answer:
x = 2, -3
Step-by-step explanation:

(x-2) = 0 or (x+3) = 0
x = 2 or x = -3
Thus, two values of x are x = 2, -3
Note: The options given are incorrect.
(8/4) = (10/x)
8x = 4 x 10
8x= 40
x = 40/8
x=5
It will take 5 hours.
If you mean: x squared -7x +12 then it is (x-3)(x-4) when factored .