Question

so sanh a va b

a = 2014 x 2012

b = 2013 x 2013

Answer 1

a= (2000+ 14) . (2000+12)= 2000(14+12)= 2000. 168

b= 2000 . 169

vậy b>a

Answer 2

Ta có:

A=2012 x 2014 

B = 2013 x 2013 = 2012 x 2014 + 1 

Vậy B lớn hơn A 

Answer 3

                    A = 2014 x (2011 + 1) = 2013 x 2012 + 2013
                    B = (2012 + 1) x 2013 = 2013 x 2012 + 2013
                Ta thấy  2012 > 2011 nên           A > B                            (A = B + 1)