Accepted Answer
[tex]x+7=0 \\ \boxed{x=-7} \\ \\ x-4=0 \\ \boxed{x=4} \\ \\ (x+7)(x-4)=0[/tex][tex]x+7=0[/tex] or [tex]x-4=0[/tex][tex]x=-7[/tex] or [tex]x=4[/tex]S= {-7 ; 4}
Suggested Answer
[tex](x+7)(x-4)=0 \Leftrightarrow x+7=0 \vee x-4=0\\
x=-7 \vee x=4[/tex]