bonjour,
A = ( 3 x - 4 ) ( x + 2 ) - 2 ( 3 x - 4 )
A = 3 x² + 6 x - 4 x - 8 - ( 6 x - 8 )
= 3 x² + 2 x - 8 - 6 x + 8
= 3 x² - 4 x
A = ( 3 x - 4 ) ( x + 2 - 2 )
= x ( 3 x - 4)
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bonjour,
A = ( 3 x - 4 ) ( x + 2 ) - 2 ( 3 x - 4 )
A = 3 x² + 6 x - 4 x - 8 - ( 6 x - 8 )
= 3 x² + 2 x - 8 - 6 x + 8
= 3 x² - 4 x
A = ( 3 x - 4 ) ( x + 2 - 2 )
= x ( 3 x - 4)