\(B-A=5,75\times2009-4,75\times2009\)
\(B-A=\text{}\text{}2009\times\left(5,75-4,75\right)=2009\times1\)
\(=2009\)
\(B-A=5,75\times2009-2009\times4,75\text{ }\)
\(B-A=\left(5,75-4,75\right)\times2009\)
\(B-A=1\times2009\)
\(B-A=2009\)
\(B-A=5,75\times2009-4,75\times2009\)
\(B-A=(5,75-4,75)\times2009\)
\(B-A=1\times2009\)
\(B-A=2009\)