Question

Tìm x để (x + 22) chia het (x + 1) ?

Answer 1

x+22 chia hết cho x+1

=>(x+1)+21 chia hết cho x+1

=>21 chia hết cho x+1

\(\Rightarrow x+1\in\left\{-21;-7;-3;-1;1;3;7;21\right\}\)

=>x=-22;-8;-4;-2;0;2;6;20