r − 2 2 r − 4 r − 2 = 0 r = 2 r − 2 2 r − 4 = ( r − 2 ) 2 ( r − 2 ) = 2
2r-4/r-2 = 2(r-2)/r-2 = 2
The expression r − 2 2 r − 4 simplifies to 2 when r = 2 . This is done by factoring the numerator and canceling out the common term in the numerator and denominator. Therefore, the final result is 2 .
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