Question

Решите неравенство (x-2)(x+4)>0

Answer 1

$\left \{ {{x-2>0} \atop {x+4>0}} \right. \\\left \{ {{x-2<0} \atop {x+4<0}} \right. \\\left \{ {{x>2} \atop {x>-4}} \right.\\ \left \{ {{x<2} \atop {x<-4}} \right.$

Ответ: x∈ (2,+∞)   x∈(-∞,-4)