Sagot :
bonsoir
x² + 12 x + 11
x² + 12 x + 11 = 0
( x + 11 ) ( x + 1 ) = 0
x = - 11 ou - 1
x² + 12 x + 11 = 11
x² + 12 x = 0
x ( x + 12 ) = 0
x = 0 ou - 12
Bonsoir,
Résoudre:
x²-12x+11= 0
x²-x-11x+11= 0
x(x-1) - 11(x-1)= 0
(x-1)(x-11)= 0
x= 1 ou x= 11
S= { 1; 11 }
x²-12x+11= 11
x²-12x+11-11= 0
x²-12x= 0
x(x-12)= 0
x= ou x= 12
S= { 0 ; 12 ]