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2018 la puterea 2-2018-2017

Răspuns :

=2018(2018-1)-2017=

= 2018 x 2017- 2017=

= 2017(2018-1)=

= 2017 x 2017=

= 2017^2

Răspuns:

Explicație pas cu pas:

2018² - 2018 - 2017 =

= 2018 × ( 2018 - 1 ) - 2017 =

= 2018 × 2017 - 2017 =

= 2017 × ( 2018 - 1 ) =

= 2017 × 2017 =

= 2017² → patrat perfect