Question

(x - 2018 ) (x+ 2018 ) = 0

Answer 1

( x - 2018).(x+2018) = 0

=> x - 2018 = 0 => x = 2018

x + 2018 = 0 => x = -2018

KL:...

Answer 2

\(\left(x-2018\right)\left(x+2018\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x-2018=0\\x+2018=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=2018\\x=-2018\end{cases}}}\)

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