bonjour
A = ( 5 - 6 x ) ( 4 x - 1 ) + 16 x² - 8 x + 1
1 ) 16 x² - 8 x + 1 = ( 4 x - 1 )²
2 ) A = ( 5 - 6 x ) ( 4 x - 1 ) + ( 4 x - 1 )²
= ( 4 x - 1 ) ( 5 - 6 x + 4 x - 1 )
= ( 4 x - 1 ) ( - 2 x + 4 )
= - 2 ( 4 x - 1 ) ( x - 2 )
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bonjour
A = ( 5 - 6 x ) ( 4 x - 1 ) + 16 x² - 8 x + 1
1 ) 16 x² - 8 x + 1 = ( 4 x - 1 )²
2 ) A = ( 5 - 6 x ) ( 4 x - 1 ) + ( 4 x - 1 )²
= ( 4 x - 1 ) ( 5 - 6 x + 4 x - 1 )
= ( 4 x - 1 ) ( - 2 x + 4 )
= - 2 ( 4 x - 1 ) ( x - 2 )