Question

So sánh 2 biểu thức :

A = 123 x 123

B = 121 x 124

Answer 1

A = 123 . 123

A = 15129.

B = 121 . 124

B = 15004.

=> 15129 >15004.

Vậy: A > B.

Answer 2

Ta có :

\(121.124=\left(123-2\right)\left(123+2\right)=123^2-2^2< 123^2\)

\(\Rightarrow A< B\)

Answer 3

Đoan cuối là A>B nhs

Answer 4

ta có: A = 123 . 123

          => A= 121.123 + 123.2

B= 121.124

=> B = 121.123 + 121

ta thấy : 121.123 + 123.2 > 121.123+121

=> A > B

vậy A > B

Answer 5

A = 15129

B = 15004

Vì 16129 > 15004 nên A > B

Answer 6

Ta có:

\(A=123.123\)

\(\Rightarrow A=\left(121+2\right).123\)

\(\Rightarrow A=121.123+246\)

\(B=121.124\)

\(\Rightarrow B=121.\left(123+1\right)\)

\(\Rightarrow B=121.123+121\)

Vì \(121.123+246>121.123+121\) nên A > B

Vậy A > B