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)