[tex]f(x) = (x - \dfrac{2}{9} )(x + \dfrac{1}{2} )[/tex]
[tex]\text {When } f(x) = 0 :[/tex]
[tex](x - \dfrac{2}{9} )(x + \dfrac{1}{2} ) = 0[/tex]
[tex](x - \dfrac{2}{9} ) = 0 \text { or } (x + \dfrac{1}{2} ) = 0[/tex]
[tex]x = \dfrac{2}{9} \text { or } x = -\dfrac{1}{2}[/tex]
