Bài làm :
Ta có :
(532x7-266x14)x(3+5+7+...+97+9)
=0x(3+5+7+...+97+9)
=0
(532×7-266×14)×(3+5+7+....+97+99)
=(3724-3724)×(3+5+7+.....+97+99)
=0×(3+5+7+...+97+99)
=0
Trả lời :
\(\left(532.7-266.14\right).\left(3+5+7+...+97+99\right)\)
\(=\left(266.2.7-266.7.2\right).\left(3+5+7+...+97+99\right)\)
\(=0.\left(3+5+7+...+97+99\right)\)
\(=0\)
Học tốt
[532x7-266x14]x[3+5+7+...+99]
=[532x7-266x2x7]x[3+5+7+...+99]
=[532x7-532x7]x[3+5+7+...+99]
=0x[3+5+7+...+99]
=0