Desarrollo :
Sabemos que :
<img src="https://tex.z-dn.net/?f=D%3D%28d%29%28q%29%2Br" />
Donde :
D : Dividendo
d : Divisor
q : cociente
r : Residuo
Nos dicen que :
<img src="https://tex.z-dn.net/?f=d%3D3q" />
<img src="https://tex.z-dn.net/?f=r%3D2q" />
Entonces :
<img src="https://tex.z-dn.net/?f=D%3D%28d%29%28q%29%2Br%0A" />
<img src="https://tex.z-dn.net/?f=456%3D%283q%29%28q%29%2B2q" />
<img src="https://tex.z-dn.net/?f=456%3D3%20q%5E%7B2%7D%20%2B2q" />
<img src="https://tex.z-dn.net/?f=3%20q%5E%7B2%7D%20%2B2q-456%3D0" />
Factorizamos con aspa simple.
<img src="https://tex.z-dn.net/?f=%283q%2B38%29%28q-12%29%3D0" />
Igualamos a 0 y tomamos el valor positivo
<img src="https://tex.z-dn.net/?f=q-12%3D0" />
<img src="https://tex.z-dn.net/?f=q%3D12" />
Por tanto el valor del Divisor sera :
[img = 10]
[img = 11]
[img = 12]
Un gusto espero te sirva : ).