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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

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