Répondre :

bonjour

A = ( x + 2 ) ( x - 3 ) + ( x - 3 )

A =  ( x - 3 ) ( x + 2 + 1 )

A = ( x - 3 ) ( x + 3 )

A = x ² - 9

si  x = 3

A = 3² - 9 = 9 - 9 = 0

B = ( 2 x - 3 )  * 7

= 14 x - 21

si x =  1.5

B = 21 - 21  = 0

bonne journée