re
A = B
( 2 x - 3 )² - 25 = ( 2 x + 2 ) ( 2 x - 8 )
( 2 x - 3 - 5 ) ( 2 x - 3 + 5 ) = ( 2 x + 2 ) ( 2 x - 8 )
( 2 x - 8 ) ( 2 x + 2 ) = ( 2 x + 2 ) ( 2 x - 8 )
donc A = B
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re
A = B
( 2 x - 3 )² - 25 = ( 2 x + 2 ) ( 2 x - 8 )
( 2 x - 3 - 5 ) ( 2 x - 3 + 5 ) = ( 2 x + 2 ) ( 2 x - 8 )
( 2 x - 8 ) ( 2 x + 2 ) = ( 2 x + 2 ) ( 2 x - 8 )
donc A = B