Réponses

2014-09-22T16:11:24+02:00
A = (x-6)² - (x-4)(x-9)
A = x² - 12x + 36 - x² + 13x - 36
A = x

99 994² - 99 996 x 99 991 = (100 000 - 6)² - (100 000 - 4)(100 000 - 9)
99 994² - 99 996 x 99 991 = 100 000