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1-x + 2x + 3 ≥ x 3 x≥7/2 x≤7/2 x≤2/7 x≥2/7 5 3 1 ≤ 7-x + 4x + 2 x≥-1/5 x≥1/5 x≥-5 x≥5 9 6 3-x - 5x+2 < - 8x+1 3 x<3/10 x>10/3 x>3/10 x>10/3 2 4 3(4+x) - 5 > 2 x>17/12 x>12/17 x<17/12 x<12/17 5 4 4x-3 + 5(3-x) ≤1 3 x≥-1 x≤-1 x≤1 x≥1 6 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,+∞) (x-2)(x+3)≥0 [-3,2] (-3,2) (-∞,-3]U[2,+∞) (-∞,-3)U(2,+∞) 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 6x+1-2x<x+13 x>-4 x<-4 x>4 x<4 6x - 3(4-x) < 2(1+x) x>2 x<2 x<-2 x>-2 -3(x+6) + 8 ≤12-5(2x+3) x≥-1 x≥1 x≤1 x≤-1 5-x≥4x+7-6x x≤2 x≤-2 x≥2 x≥-2 |