1. (27-X).(X+9)=0 2. (-X).(X-43)=0

2 bình luận về “1. (27-X).(X+9)=0 2. (-X).(X-43)=0”

1. 1 ) ( 27 -x ) ( x + 9 )=0

   TH1 : 27 -x =0 => x = 27

   TH2 : x +9 =0 => x =-9

   Vậy : x\in { 27 ; -9 }

   2 ) ( -x ) ( x – 43 )=0

   TH1 : -x =0 => x=0

   TH2 : x- 43 =0 => x = 43

   Vậy : x\in { 0 ; 43 }

   Trả lời
2. 1. ( 27 – x )( x + 9 ) =0.

   $\text{*TH1:}$

   27 – x = 0

   x = 27 – 0

   x = 27.

   $\text{*TH2:}$

   x + 9 = 0

   x = 0 – 9

   x = -9.

   -> Vậy x \in {27; -9}.

   2. (-x)( x – 43 ) = 0.

   $\text{*TH1:}$

   x = 0.

   $\text{*TH2:}$

   x – 43 = 0

   x = 0 + 43

   x = 43.

   -> Vậy x \in {0; 43}.

   $\color{purple}{\text{#lengoclinh211}}$

   Trả lời