A = 2016 . 2016
<=> A = ( 2014 + 2 ) . 2016
<=> A = 2014 . 2016 + 2 . 2016
B = 2014 .2018
<=> B = 2014 . ( 2016 + 2 )
<=> B = 2014 . 2016 + 2014 .2
Ta thấy : 2014 . 2016 = 2016 . 2014 màk 2 . 2016 > 2014 . 2
=> A > B
^^ Học tốt!
A=2016.2016=2016.(2014+2)=2016.2014+2016.2
B=2014.2018=2014.(2016+2)=2014.2016+2014.2
Vì 2016.2>2014.2 nên 2016.2014+2016.2>2014.2016+2014.2
Vậy A>B.
A = 2016 x 2016
A = ( 2014 + 2 ) x 2016
A = 2014 x 2016 + 2 x 2016 (1)
B = 2014 x 2018
B = 2014 x ( 2016 + 2 )
B= 2014 x 2 + 2014 x 2016 (2)
Vì 2016 > 2014 => 2016 x 2 > 2014 x 2 (3)
Từ (1) (2) (3) => 2016x 2 + 2016 x 2014 > 2016 x 2014 + 2014 x 2
Hay A > B
vậy A > B