Sagot :
bonjour
A = ( x + 2 ) ( x - 3 ) + ( x - 3 )
A = x² - 3 x + 2 x - 6 + x - 3
A = x² - 9
si x = 3 , A = 3² - 9 = 0
si x = 0 , A = - 9
B = ( 2 x - 3 )² = 4 x² - 12 x + 9
si x = 1.5
B = 4 *1.5² - 12*1.5 + 9 = 9 + 9 - 18 = 0
si x = 0
B = 9
bonjour
A = ( x + 2 ) ( x - 3 ) + ( x - 3 )
A = x² - 3 x + 2 x - 6 + x - 3
A = x² - 9
si x = 3 , A = 3² - 9 = 0
si x = 0 , A = - 9
B = ( 2 x - 3 )² = 4 x² - 12 x + 9
si x = 1.5
B = 4 *1.5² - 12*1.5 + 9 = 9 + 9 - 18 = 0
si x = 0
B = 9