What are the zeros of f(x) = (2x - 6)(x + 4)?

The zeros of a product are the values that make a factor zero. Setting $2x-6=0$ gives $2x=6$, so $x=3$. Setting $x+4=0$ gives $x=-4$. The zeros are $3$ and $-4$, choice F. Choice H ($6,-4$) forgets to divide by $2$ in the first factor. Choice G ($-3,4$) has the signs of both zeros reversed. Choice J ($3,4$) reverses only the sign of the second. Check: $f(3)=0\cdot7=0$ and $f(-4)=(-14)(0)=0$. A factor $(x+4)$ gives a zero at $-4$, not $4$.