Question

|x+1|+12+|x+15|=2

Answer 1

|x+1|+|x+15|=2-12

|x+1|+|x+15|=-10

Vì |x+1|+|x+15| >= 0 mà -10<0

=> x vô nghiệm

Answer 2

|x+1| + 12 + |x+15| = 2

|x+1| + |x+15| = 2 - 12

|x+1| + |x+15| = - 10

Mà |x+1| + |x+15| \(\ge\) 0 > -10

\(\Rightarrow\) x \(\in\varnothing\)

Answer 3

\(\left|x+1\right|+12+\left|x+15\right|=2\\ \Leftrightarrow\left|x+1\right|+\left|x+15\right|=-10\\ \left|x+1\right|+\left|x+15\right|>0\\ \Rightarrow x\in\varnothing\)

Answer 4

|x+1| + 12 + |x+15| = 2

|x+1| + |x+15| = 2 - 12

|x+1| + |x+15| = - 10

Mà |x+1| + |x+15| 0 > -10

x