Question

Rút gọn:

D=/x-1/-/x-2/

Answer 1

D=/x/-1-/x/-2

D=/x/-/x/-(1+2)

D=0-3

D=-3

Nhớ   nha

Answer 2

\(D=\left|x-1\right|-\left|x-2\right|\)

\(\Rightarrow D=\left|x\right|-\left|x\right|-\left(1+2\right)\)

\(D=\left|x\right|-\left|x\right|-3\)

\(D=0-3\Rightarrow D=-3\)

Answer 3

cảm ơn các bn nhé