Q. The solutions to the inequality (2−x)(x+1)x<0 are:A: x>2B: 0<x<1 or x>2C: x<−1 or 0<x<2D: −1<x<0 or x>2E: −1<x<0
Identify critical points: Identify the critical points of the inequality by setting each factor to zero.(2-x)(x+1)x < 0Set each factor to zero:2−x=0⇒x=2x+1=0⇒x=−1x=0The critical points are x=−1, x=0, and x=2.
Determine intervals: Determine the intervals to test around the critical points.The intervals are:(−∞,−1), (−1,0), (0,2), and (2,∞).
Test each interval: Test each interval to see if the inequality holds true. Choose a test point from each interval and plug it into the inequality. For (−∞,−1), let's choose x=−2: (2 - (-2))((-2) + 1)(-2) = (4)(-1)(-2) = 8 > 0, so this interval does not satisfy the inequality.
Test (−∞,−1): Test the interval (−1,0).Choose x=−0.5:(2 - (-0.5))((-0.5) + 1)(-0.5) = (2.5)(0.5)(-0.5) = -0.625 < 0, so this interval satisfies the inequality.
Test (−1,0): Test the interval (0,2).Choose x=1:(2 - 1)(1 + 1)(1) = (1)(2)(1) = 2 > 0, so this interval does not satisfy the inequality.
Test (0,2): Test the interval (2,∞).Choose x=3:(2 - 3)(3 + 1)(3) = (-1)(4)(3) = -12 < 0, so this interval satisfies the inequality.
Test (2,∞): Combine the intervals that satisfy the inequality.From our tests, the intervals that satisfy the inequality are: -1 < x < 0 and x > 2 .
Combine intervals: Match the combined intervals with the given choices.The correct answer is D: -1 < x < 0 or x > 2.