a) 5³+2³×5²-8²×5 =
[tex]=125+2^3\times \:5^2-8^2\times \:5[/tex]
[tex]=125+8\times \:5^2-8^2\times \:5[/tex]
[tex]=125+8\times \:25-8^2\times \:5[/tex]
[tex]=125+8\times \:25-64\times \:5[/tex]
[tex]=125+200-64\times \:5[/tex]
[tex]=125+200-64\times \:5[/tex]
[tex]=125+200-320[/tex] = 5
b) (3×5³+2×5³):5²
[tex]3\times \:5^3+2\times \:5^3[/tex]
[tex]=3\times \:125+2\times \:125[/tex]
[tex]=3\times \:125+2\times \:125[/tex]
[tex]=375+250[/tex] = 625
[tex]=625\div \:25[/tex] = 25
Sper că te-am ajutat!
Succes!
