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x(x2+2x)≥x+2 (-2,-1)U(1,+∞) (-∞,-2)U(-1,1) [-2,-1]U[1,+∞) (-∞,-2]U[-1,1] x2-2x+3x-6<0 [-3,2] (-3,2) (-∞,-3)U(2,+∞) (-∞,-3]U[2,+∞) x2-4 ≤0 [-2,2] no hay solución (-∞,-2)U(2,+∞) (-∞,-2]U[2,+∞) x2 >4 (-∞,-2]U[2,+∞) (-∞,-2)U(2,+∞) (-2,2) [-2,2] (x-2)(x+3)≥0 [-3,2] (-3,2) (-∞,-3]U[2,+∞) (-∞,-3)U(2,+∞) (x+1)(x-1)(x+2)<0 (-∞,2)U(-1,1)U(1,+∞) (-∞,-2)U(-1,1) (2,-1)U(-1,1) (-2,-1)U(1,+∞) x2+4x-12>0 (-∞,-6)U(2,+∞) (-6,2) [-6,2] (-∞,-6]U[2,+∞) (x+6)2 ≤0 x≥6 (-∞,-6)U(6,+∞) x=-6 x≤-6 |