Răspuns:
D
Explicație pas cu pas:
[(2020x+2020^2)-2020]:2020=2021
(2020x+2020^2)-2020=2021*2020
2020x+2020^2=4082420+2020
2020x=4084440-4080400
2020x=0
x=0
Verificare:
[(0+2020]*2020-2020]:2020
[(2020*2020)-2020]:2020
(4080400-2020):2020
4078380:2020
2019(gresit)=> x=2