Sagot :

maudmarine

Bonsoir,

Factoriser 3 expressions :

A = x² - 1

A = (x - 1) (x + 1)

B = 25x² - 1

B = (5x - 1) (5x + 1)

C = (x-3)²-4

C = (x - 3 - 2) (x - 3 + 2)

C = (x - 5) (x - 1)