Question

giá trị thỏa mãn |x-2,2|=|0,2+x| .vậy x= bao nhiêu??????????????????????????

Answer 1

1

Answer 2

\(\left|x-2,2\right|=\left|0,2+x\right|\)

Bình phương 2 vế ta có:

\(\left(\left|x-2,2\right|\right)^2=\left(\left|0,2+x\right|\right)^2\)

\(\Leftrightarrow0,04\left(25x^2-110x+121\right)=0,04\left(25x^2+10x+1\right)\)

\(\Leftrightarrow25x^2-110x+121=25x^2+10x+1\)

\(\Leftrightarrow120x=120\Leftrightarrow x=1\)