BAMBICAMILLE
Answered

factoriser a

a= 9x au carré - 49 + (3x+7)(2x-3)

merci​

Sagot :

MAUDMARINE

Bonsoir,

Factoriser a  :

a= 9x² - 49 + (3x+7)(2x-3)

a = (3x - 7) (3x + 7) + (3x - 7) (2x - 3)

a = (3x + 7) (3x - 7 + 2x - 3)

a = (3x + 7) (5x - 10)

a = 5 (x - 2) (3x + 7)