Răspuns:
a) 0; b) 1000
Explicație pas cu pas:
factor comun 2015:
[tex]4098 \times 2015 - 2015 \times 4097 - 2015 = 2015(4098 - 4097 - 1) = 2015 \times 0 = 0[/tex]
b) 2017×2018 - 2017×1018 - 1000×2016 = 2017(2018 - 1018) - 1000×2016 = 2017×1000 - 1000×2016 = 1000(2017 - 2016) = 1000×1 = 1000
