Sagot :
Bonsoir,
A= (x - 1)(x -6)
= x² - 6x - x + 6
= x² - 7x + 6
B= (x - 3)(x + 5)
= x² + 5x - 3x - 15
= x² + 2x - 15
C= (2x + 1)(1 - 5x)
= 2x - 10x² + 1 - 5x
= -10x² - 3x + 1
En espérant t'avoir aidé,
Bonsoir,
A= (x - 1)(x -6)
= x² - 6x - x + 6
= x² - 7x + 6
B= (x - 3)(x + 5)
= x² + 5x - 3x - 15
= x² + 2x - 15
C= (2x + 1)(1 - 5x)
= 2x - 10x² + 1 - 5x
= -10x² - 3x + 1
En espérant t'avoir aidé,