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x -6
x +3
-6x +3x =-3x
(x-6)(x+3) = 0
x-6 =0 x+3 = 0
x = 6 x = -3
CS =(-3;6)
x² - 3x - 18 = 0 Factorizas trinomio de la forma x² + bx + c
(x - 6)(x + 3) = 0 Tiene como solución dos raices reales
x - 6 = 0
x = 6
o
x + 3 = 0
x = - 3
Solución
(6 , - 3)