A. \[\frac{{ - 13}}{{22}}\]
B. \[\frac{{13}}{{22}}\]
C. \[\frac{{ - 13}}{{18}}\]
D. \[\frac{{ - 117}}{{198}}\]
\[\frac{{2.9.52}}{{22.\left( { - 72} \right)}} = \frac{{{{2.3}^2}{{.2}^2}.13}}{{2.11.\left( { - {2^3}{{.3}^2}} \right)}}\]
\[ = \frac{{{2^3}{{.3}^2}.13}}{{ - {2^4}{{.3}^2}.11}} = \frac{{13}}{{ - 2.11}} = \frac{{ - 13}}{{22}}\]
Đáp án cần chọn là: A