bonjour
( x - 2 )² - ( x - 3 ) ( x - 4 ) = 3 x - 8
(x² - 4 x + 4 ) - ( x² - 4 x - 3 x + 12 ) = 3 x - 8
x² - 4 x + 4 - x² + 7 x - 12 = 3 x - 8
3 x - 8 = 3 x - 8
9 998 ² - 9 997 * 9 996
ici x = 1 000 donc x - 2 = 9998
x - 3 = 9997
x - 4 = 9996
donc 3 x - 8 = 30000 - 8 = 29 992
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bonjour
( x - 2 )² - ( x - 3 ) ( x - 4 ) = 3 x - 8
(x² - 4 x + 4 ) - ( x² - 4 x - 3 x + 12 ) = 3 x - 8
x² - 4 x + 4 - x² + 7 x - 12 = 3 x - 8
3 x - 8 = 3 x - 8
9 998 ² - 9 997 * 9 996
ici x = 1 000 donc x - 2 = 9998
x - 3 = 9997
x - 4 = 9996
donc 3 x - 8 = 30000 - 8 = 29 992