Question

(2a+7) chia het cho (a+5).tim a

Answer 1

Ta có: \(2a+5⋮a+5\) 

        \(\Rightarrow2⋮a+5\)

         \(\Rightarrow a+5\inƯ\left(2\right)=\left\{\pm1,\pm2\right\}\)

Ta có bảng sau:

a+5	1	-1	2	-2
a	4	-6	3	-7

Vậy a= { 3,4,-6,-7}

Answer 2

Sorry .minh chep nham de :(a+7) chia het cho (a+5)