Question

Tìm x :

( x - 255 ) . ( 3x - 249 ) = 0

Answer 1

TH1: x - 255 = 0

=> x = 255

TH2:

3x - 249 = 0

3x = 249

=> x = 83

Vậy x = 255 hoặc x = 83

Answer 2

x-225=0 hoặc 3x-249=0

\(\Rightarrow\left\{{}\begin{matrix}x=225\\x=83\end{matrix}\right.\)