bonsoir
( 7 x - 3 )² - x ( 7 x - 3)
= ( 7 x - 3 ) ( 7 x - 3 - x )
= ( 7 x - 3 ) ( 6 x - 3 )
= 3 ( 7 x - 3 ) ( 2 x - 1 )
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bonsoir
( 7 x - 3 )² - x ( 7 x - 3)
= ( 7 x - 3 ) ( 7 x - 3 - x )
= ( 7 x - 3 ) ( 6 x - 3 )
= 3 ( 7 x - 3 ) ( 2 x - 1 )