a) \(75^2-25^2=(75-25)(75+25)=50.100=5000\)
b) \(37^2 - 13^2=(37-13)(37+13)=24.50=1200\)
c) \(2002^2 - 2^2=(2002-2)(2002+2)=2000.2004=4008000 \)
Câu a :
\(75^2-25^2=\left(75-25\right)\left(75+25\right)=50.100=5000\)
Câu b :
\(37^2-13^2=\left(37-13\right)\left(37+13\right)=24.50=1200\)
Câu c :
\(2002^2-2^2=\left(2002-2\right)\left(2002+2\right)=2000.2004=4008000\)