Question

5x+38 chia hết cho x+2 

tìm x

 

Answer 1

5x+10+28 chia hết x+2

=> 28 chia hết x+2

=> x+2 thuộc ước 28

Answer 2

\(\left(5x+38\right)⋮\left(x+2\right)\)

\(\Rightarrow\left(5x+10+28\right)⋮\left(x+2\right)\)

\(\Rightarrow28⋮\left(x+2\right)\)

\(\Rightarrow x+2\inƯ\left(28\right)=\left\{1;2;4;7;14;28;-1;-2;-4;-7;-14;-28\right\}\)

\(\Rightarrow x\in\left\{...........\right\}\)

Tính giùm