In order to find the middle product, let us multiply the given values:
(x - 4)(x - 3)
x^2 - 4x - 3x + 12
x^2 -7x + 12 (the product)
So, it is clear that the middle product is -7x. So the answer for this question would be the last option. Hope this is the answer that you are looking for. Have a great day!