Question

Mn ơi, giúp mình với!

Answer 1

\(2x+7⋮x+2\)

\(\Leftrightarrow x+2\in\left\{1;-1;3;-3\right\}\)

hay \(x\in\left\{-1;-3;1;-5\right\}\)

Answer 2

\(\Rightarrow2\left(x+2\right)+3⋮x+2\\ \Rightarrow x+2\inƯ\left(3\right)=\left\{-3;-1;1;3\right\}\\ \Rightarrow x\in\left\{-5;-3;-1;1\right\}\)