Question

a) x( x-6 )=0
b) x( x-5 )=0
c) (x+3) (x-7)=0

Mong mn giúp mình trước 19:00 ạ 

Answer 1

Answer 2

a, x( x - 6) = 0 <=> x = 0 ; x = 6

b, x ( x - 5) = 0 <=> x = 0 ; x = 5 

c, ( x + 3)( x - 7) = 0 <=> x = -3 ; x = 7

Answer 3

a) \(x.\left(x-6\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x=0\\x-6=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=0\\x=6\end{matrix}\right.\)

b) làm tương tự

c) \(\left(x+3\right).\left(x-7\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x+3=0\\x-7=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-3\\x=7\end{matrix}\right.\)

Answer 4

a) Ta có: x(x-6)=0

nên \(\left[{}\begin{matrix}x=0\\x-6=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=0\\x=6\end{matrix}\right.\)

b) Ta có: x(x-5)=0

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x-5=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=0\\x=5\end{matrix}\right.\)

c) Ta có: (x+3)(x-7)=0

\(\Leftrightarrow\left[{}\begin{matrix}x+3=0\\x-7=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-3\\x=7\end{matrix}\right.\)