Tìm Ư\[\left( { - \,4} \right)\].
Giải thích
Ư\[\left( { - \,4} \right) = \left\{ { - \,4\,;\, - 2\,;\,\, - 1\,;\,\,1\,;\,\,2\,;\,\,\;4} \right\}\]
Ư\[\left( { - \,4} \right) = \left\{ { - \,4\,;\, - 2\,;\,\, - 1\,;\,\,1\,;\,\,2\,;\,\,\;4} \right\}\]