Question

(x - 2 ) . ( x + 5 ) < 0

Answer 1

(x-2) . (x+5) <0 câu hỏi là gì bạn

Answer 2

Vì x - 2 < x + 5

nên \(\left\{{}\begin{matrix}x\text{-}2\text{ < 0}\\x\text{+}5>0\end{matrix}\right.\)

=>\(\left\{{}\begin{matrix}x< 2\\x>\text{ −}5\end{matrix}\right.\)

=>−5<x<2

=>x e \(\left\{1,0,\text{−}1,\text{−}2,\text{−}3,\text{−}4\right\}\)

vậy ...........................................

Answer 3

(x-2)(x+5)<0

=>x-2 và x+5 trái dấu

Mà x-2<x+5

=>\(\left\{{}\begin{matrix}x-2< 0\\x+5>0\end{matrix}\right.\)=>\(\left\{{}\begin{matrix}x< 2\\x>-5\end{matrix}\right.\)=>-5<x<2

=>x E {-4;-3;-2;-1;0;1}