Question

So sánh A va B ma khong tính gia tri biet A= 2016*2016 va B =2015*2017

Answer 1

A = 2016 x 2016

A = (2015 + 1) x 2016

A = 2015 x 2016 + 2016

B = 2015 x 2017

B = 2015 x (2016 + 1)

B = 2015 x 2016 + 2015

Vì 2016 > 2015

=> A > B

Answer 2

A = \(2016^2\)

B = \(\left(2016-1\right)\left(2016+1\right)=2016\left(2016+1\right)-\left(2016+1\right)\)= \(2016^2+2016-2016-1\)= \(2016^2-1\)

\(\Rightarrow A>B\). Vậy A > B