Question

\(\dfrac{2006\times2006-2005\times2007}{2007\times2006-2005\times2006}\)

Answer 1

bằng 1/1 nhé 

gạch các số giống nhau

 

Answer 2

sos cứu bt tiếng anh với

 

Answer 3

\(\dfrac{2006\times2006-2005\times2007}{2007\times2006-2005\times2006}\)

\(=\dfrac{2006\times2006-2005\times\left(2006+1\right)}{\left(2006+1\right)\times2006-2005\times2006}\)

\(=\dfrac{2006\times2006-2005\times2006-2005}{2006\times2006-2005\times2006+2006}\)

\(=\dfrac{2006\times\left(2006-2005\right)-2005}{2006\times\left(2006-2005\right)+2006}\)

\(=\dfrac{2006-2005}{2006+2006}\)

\(=\dfrac{1}{4012}\)