Sagot :
bjr
(x - 2)(7x + 6) = (* = multiplié)
x*7x + x*6 -2*7x - 2*6 =
7x² + 6x - 14x - 12 = (on réduit 6x - 14x = (6 - 14)x = -8x]
7x² - 8x - 12
bjr
(x - 2)(7x + 6) = (* = multiplié)
x*7x + x*6 -2*7x - 2*6 =
7x² + 6x - 14x - 12 = (on réduit 6x - 14x = (6 - 14)x = -8x]
7x² - 8x - 12