a) ta có 3452 = 119025
342.348= 119016
vì 119025>119016
\(\Rightarrow\) 3452 > 342.348
a) 342.348= (345-3)(345+3)
=3452+3.345-3.345-9=3452-9<3452
=> 3452>342.348
b) 598673.598679= (598676-3)(598676+3)
=5986762+3.598676-3.598676-9
=5986762-9<5986762
=> ........
\(\)Xét:
\(VP=342.348\)
\(VP=\left(345-3\right)\left(345+3\right)\)
\(VP=345^2-3^2\)
\(VP=345^2-9\)
\(VP< VT\)
b) Xét:
\(VP=598673.598679\)
\(VP=\left(598676-3\right)\left(598676+3\right)\)
\(VP=598676^2-3^2\)
\(VP=598676^2-9\)
\(VP< VT\)
