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x -3
x +1
-3x + x = -2x
(x-3)(x+1) = 0
x-3 = 0 x+1 = 0
x = 3 x = -1
CS = (-1; 3)
2x^2 - 5x = 6 - x
2x^2 - 5x + x = 6
2x^2 - 4x = 6
2x^2 - 4x - 6 = 0 ( sacamos mitad a todos los terminos)
x^2 - 2x - 3 = 0
x -3
x +1
x - 3 = 0 v x + 1 = 0
x = 3 x = -1
C.S = { 3, -1}