Answer:
x = - 3 , x = 4
Explanation:
to find the zeros let f(x) = 0 , that is
(2x + 6)(x - 4) = 0
equate each factor to zero and solve for x
2x + 6 = 0 ( subtract 6 from both sides )
2x = - 6 ( divide both sides by 2 )
x = - 3
x - 4 = 0 ( add 4 to both sides )
x = 4
the zeros are x = - 3 , x = 4