Question

-x.(8-x)=0

(4-x).(x+3)=0

(3x-9).(2x-6)=0

Answer 1

(-x)(8 - x) = 0

\(\Rightarrow\orbr{\begin{cases}-x=0\\8-x=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x=8\end{cases}}}\)

(4 - x)(x + 3) = 0

\(\Rightarrow\orbr{\begin{cases}4-x=0\\x+3=0\end{cases}\Rightarrow\orbr{\begin{cases}x=4\\x=-3\end{cases}}}\)

(3x - 9)(2x - 6) = 0

\(\Rightarrow\orbr{\begin{cases}3x-9=0\\2x-6=0\end{cases}\Rightarrow\orbr{\begin{cases}3x=9\\2x=6\end{cases}\Rightarrow}\orbr{\begin{cases}x=3\\x=3\end{cases}}}\)

Answer 2

0 nha bn 

chuc bn hoc gioi

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