Question

|x+1|=12

Answer 1

Vì |12| = |-12| = 12

=> x+1 thuộc {-12;12}

* x+1 = 12

x=12-1

x=11

* x+1 = -12

x=(-12) - 1

x=-13

Vậy x thuộc {11;-13}

Answer 2

|x+1|=12

=>x+1=-12 hoặc x+1=12

+)Nếu x+1=-12

=>x=-12-1=-13

+)Nếu x+1=12

=>x=12-1=11

Vậy x=-13 hoặc x=11

Answer 3

       \(\left|x+1\right|=12\)

\(\Leftrightarrow\orbr{\begin{cases}x+1=12\\x+1=-12\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=12-1\\x=-12-1\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=11\\x=-13\end{cases}}\)

     Vậy \(x\in\left\{11;-13\right\}\)

Answer 4

\(\left|x+1\right|=12\)

\(\Rightarrow\orbr{\begin{cases}x+1=12\\x+1=-12\end{cases}}\)

\(\orbr{\begin{cases}x=11\\x=-13\end{cases}}\)

Answer 5

\(\text{Ta có: |x+1|=12 }\)

\(\Leftrightarrow x+1=12\)

\(\Leftrightarrow x+1=-12\)

\(\Rightarrow x=12-1\)

\(\Rightarrow x=-12-1\)

\(\Rightarrow x=11\)

\(\Rightarrow x=-13\)