Toán Lớp 6: Tìm x ∈ ZZ biết :
-3 ( x + 4 ) ( x – 1 ) = 0
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Toán Lớp 6: Tìm x ∈ ZZ biết :
-3 ( x + 4 ) ( x – 1 ) = 0
Comments ( 2 )
Answer:
-3 ( x + 4 ) ( x – 1 ) = 0
=>\(\left[ \begin{array}{l}-3.(x+4)=0\\x-1=0\end{array} \right.\)
=>\(\left[ \begin{array}{l}x+4=0\\x-1=0\end{array} \right.\)
=>\(\left[ \begin{array}{l}x=-4\\x=1\end{array} \right.\)
Vậy \(\left[ \begin{array}{l}x=-4\\x=1\end{array} \right.\)
#Boy
Ta có:
-3 ( x + 4 ) ( x – 1 ) = 0
=> TH1:
-3 ( x + 4 ) = 0
x + 4 = 0
x = 0 – 4
x = -4
TH2:
x – 1 = 0
x = 0 + 1
x = 1
Vậy x ∈ { -4; 1 }