Sagot :
x²+x-6 = 6
x² + x - 12 = 0 => (x + 4)(x - 3) = 0 => x = -4 ou x = 3
f(x) = 6
x² +x -6 = 6
x² +x -12 = 0
(x-3)(x+4) = 0
Donc x=3 ou x=-4.
F(x) = x²+x-6 Résoudre l'équation f(x)=6
x²+x-6 = 6
x² + x - 12 = 0 => (x + 4)(x - 3) = 0 => x = -4 ou x = 3
f(x) = 6
x² +x -6 = 6
x² +x -12 = 0
(x-3)(x+4) = 0
Donc x=3 ou x=-4.