Toán Lớp 8: so sánh D và E biết:
D= 2019×2021
E= 2020 ²
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Toán Lớp 8: so sánh D và E biết:
D= 2019×2021
E= 2020 ²
Comments ( 1 )
=> D = ( 2020 – 1 ) . 2021
=> D = 2020 . 2021 – 2021
Ta có : E = 2020^2
=> E = 2020 . 2020
=> E = ( 2021 – 1 ) . 2020
=> E = 2020 . 2021 – 2020