Réponse :
g(x) = ( 2x + 7 )( 3x - 5 ) = -35
<=> 6x² - 10x + 21x - 35 = -35
<=> 6x² - 10x + 21x = 0
<=> 6x² + 11x = 0
<=> x ( 6x + 11 ) = 0
<=> x = 0 ou 6x + 11 = 0
<=> x = 0 ou 6x = -11
<=> x = 0 ou 6x/6 = -11/6
<=> x = 0 ou x = -11/6
S= { 0 ; -11/6 }
Explications étape par étape
