Question

计算102.46^2+0.46^2-2*102.46*0.46-2^2=?

Answer 1

10400

102.46^2+0.46^2-2*102.46*0.46-2^2

=(102.46^2+0.46^2-2*102.46*0.46)-2^2

=(102.46-0.46)^2-2^2

=102^2-2^2=(102+2)(102-2)

=10400