va rogggggggggg rapid 2018^2-2018 x 2019 si 2019^2 - 2 x 2019 x 2020 + 2020^2

Răspuns :

Răspuns:

2018²-2018*2019 = 2018*2018-2018*2019= 2018(2018-2019) = 2018*(-1) = -2018

2019²-2*2019*2020+2020² = 2019*2019-2*2019*2020+2020*2020=2019*2020(2019-2+2020)=2019*2020*4037