Question

(7–x).( x + 19) = 0

Answer 1

Ta có: (7 – x).( x + 19) = 0

=> 7- x =0

Hoặc: x + 19 = 0

* Nếu: 7- x =0

=> x= 0+7 = 7

* Nếu: x + 19 =0

=> x = 0 - 19 = -19

Vậy: x = 7;-19

Tick mink nha bn

Answer 2

Lời giải

dạng phương trình tích

\(\Leftrightarrow\left[{}\begin{matrix}7-x=0\\x+19=0\end{matrix}\right.\) \(\Rightarrow\left[{}\begin{matrix}x=7\\x=-19\end{matrix}\right.\)

Answer 3

\(\left[{}\begin{matrix}7-x=0\\x+19=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=-7\\x=-19\end{matrix}\right.\)

Vậy...

Answer 4

\(\left(7-x\right)\left(x+19\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}7-x=0\\x+19=0\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=7\\x=-19\end{matrix}\right.\)

Vậy, \(x\in\left\{-19;7\right\}\)