Question

( x - 2019 )( x - 2020 ) = 0

Answer 1

`( x - 2019 )( x - 2020 ) = 0`

`@ TH1`

`x-2019=0`

`x=0+2019`

`x=2019`

` @ TH2`

`x-2020=0`

`x=0+2020`

`x=2020`

Answer 2

\(\text{( x – 2019 ) ( x – 2020 ) = 0}\)

\(\text{+) x – 2019 = 0 }\)\(\Rightarrow\text{x = 2019}\)

\(\text{+) x – 2020 = 0}\) \(\Rightarrow\text{x = 2020}\)

Answer 3

Có: (x - 2019)(x - 2020) = 0

=> \(\left[{}\begin{matrix}x-2019=0\\x-2020=0\end{matrix}\right.\)           => \(\left[{}\begin{matrix}x=2019\\x=2020\end{matrix}\right.\)

Vậy x ∈ {2019; 2020}

Answer 4

x=2019,2020

Answer 5

`(x-2019)(x-2020) = 0`

\(\Rightarrow\left\{{}\begin{matrix}x-2019=0\\x-2020=0\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}x=2019\\x=2020\end{matrix}\right.\)