bonsoir
( 2 x + 1 ) / x + x
= [ ( 2 x + 1 ) + x ( x ) ] / x
= ( 2 x + 1 + x² ) / x
= ( x + 1 )² / x
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bonsoir
( 2 x + 1 ) / x + x
= [ ( 2 x + 1 ) + x ( x ) ] / x
= ( 2 x + 1 + x² ) / x
= ( x + 1 )² / x