Sagot :
Réponse :
Explications étape par étape
Bonsoir
Recopier et compléter :
* | .......... | .........
... | 12x^2 | -24x
... | ........... | -40
12x^2 = 12x * x
-24x = 12x * -2
-40 = -2 * 20
20 * x = 20x
* | .....x......| ...(-2)
12x | 12x^2 | -24x
20 | 20x.... | -40
12x^2 = 6x * 2x
-24x = 6x * (-4)
-40 = -4 * 10
10 * 2x = 20x
* | .....2x.. | ..(-4)
6x | 12x^2 | -24x
10 | ....20x | -40
12x^2 = 3x * 4x
-24x = 3x * -8
-40 = -8 * 5
5 * 4x = 20x
* | ...4x.... | ...-8....
3x | 12x^2 | -24x
5 | ...20x.. | -40
12x^2 = 4x * 3x
-24x = 4x * (-6)
-40 = (-6) * 20/3
20/3 * 3x = 20x
* | ....3x.... | ..(-6).....
4x | 12x^2... | -24x
20/3 | ...20x..... | -40