\(\dfrac{1997\times1996-1}{1995\times1997+1996}\)

\(=\dfrac{1997\times\left(1995+1\right)-1}{1997\times1995+1996}\)

\(=\dfrac{1997\times1995+1997-1}{1997\times1995+1996}\)

\(=\dfrac{1997\times1995+1996}{1997\times1995+1996}\)

\(=1\)

\(A=\dfrac{1997\times1996-1}{1995\times1997+1996}=\dfrac{1997\times\left(1995+1\right)-1}{1995\times1997+1996}=\dfrac{1995\times1997+1997-1}{1995\times1997+1996}=\dfrac{1995\times1997+1996}{1995\times1997+1996}=1\)

`A=(1997xx1996-1)/(1995xx1997+1996)`

`=(1997xx(1995+1)-1)/(1995xx1997+1996)`

`=(1997xx1995 +1997-1)/(1995xx1997+1996)`

`= (1997xx1995+1996)/(1995xx1997+1996)`

`=1`

các bạn giúp mình nha

\(\frac{1997.1996-97}{1995.1997-1000}=\frac{1997.1995+1997-97}{1997.1995-1000}=\frac{1997.1995-1000}{1997.1995-1000}=1\)

\(\frac{1997\times1996-97}{1995\times1997-1000}=\frac{1997\times1995+1997-97}{1997\times2995+1000}=\frac{1997\times1995+1000}{1997\times1995+1000}=1\)

\(\frac{1997x1996-1}{1995x1997+1996}\)

\(=\frac{1997x\left(1995+1\right)-1}{1997x1996+1996}\)

\(=\frac{1997x1995+1997-1}{1997x1995+1996}\)

\(=\frac{1997x1995+1996}{1997x1995+1996}\)

=1

\(\frac{1997x1996-1}{1995x1997+1996}=\frac{2.1-1}{1.1+1996}=\frac{1}{1997}\)

chắc vậy 

\(\frac{1997x1996-1}{1995x1997+1996}\)\(=\frac{1996-1}{1995+1996}\)( rút gọn tử cho mẫu )

= \(\frac{-1}{1995}\)

theo mik thui sai thì thui nha

\(\frac{1997x1996-995}{1995x1997+1002}=\frac{1997x\left(1995+1\right)-995}{1995x1997+1002}\)

                                    \(=\frac{1997x1995+1997x1-995}{1995x1997+1002}\)

                                    \(=\frac{1997x1995+1997-995}{1995x1997+1002}\)   

                                     \(=\frac{1997x1995+1002}{1995x1997+1002}=1\) 

1997x1996-1/1995x1997+1996

=1997x(1995+1)-1/1995x1997-1996

=1997x1995+1997x1-1/1995x1997+1996

=1997x1995+1996/1995x1997+1996

=1

Tích nha

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