To find the zero you must set each factor equal to zero and solve for for x like so...
Factor (x - 7)
x - 7 = 0
x = 7
Factor (x + 4)
x + 4 = 0
x = -4
Factor (3x - 2)
3x - 2 = 0
3x = 2
x = [tex]\frac{2}{3}[/tex]
All the zeros are:
-4, [tex]\frac{2}{3}[/tex], 7
Hope this helped!
~Just a girl in love with Shawn Mendes