Question

tìm x : (x-2)(x+3)=0

Answer 1

(x - 2)(x + 3) = 0

=> x - 2 = 0 hoặc x + 3 = 0

=> x = 2 hoặc x = -3

Vậy x thuộc {2 ; -3}

Answer 2

\(\text{Ta có : (x - 2) . (x + 3) = 0 }\)

\(\Leftrightarrow\orbr{\begin{cases}x-2=0\\x+3=0\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=0+2\\x=0-3\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=2\\x=-3\end{cases}}\)

Answer 3

\(\left(x-2\right)\left(x+3\right)=0\)

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

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