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simlify by removing factors of 1

(r^2-1)/(r+1)square 2
13 years ago

Answers

Vosnian
r ^ 2 - 1 = ( r + 1 ) * ( r - 1 )


( r ^ 2 - 1 ) / ( r + 1 ) ^ 2 =

[ ( r + 1 ) * ( r - 1 ) ] / [ ( r + 1 ) * ( r + 1 ) ] =

( r - 1 ) / ( r + 1 )
13 years ago

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