Putem sa scriem mai simplu asa:
[tex]a = {2}^{120} - {2}^{119} - {2}^{118} [/tex]
Dam factor comun:
[tex]a = {2}^{118} ( {2}^{2} - 2 - 1)[/tex]
[tex]a = {2}^{118} \times 1[/tex]
[tex]a = {2}^{118} [/tex]
[tex]b = {3}^{88} + {3}^{87} [/tex]
[tex]b = {3}^{87} (3 + 1)[/tex]
[tex]b = {3}^{87} \times 4[/tex]
