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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

The expression 1 x+2 x-1 + 1 x-2 x-1 simplifies to :

Options

  1. A2 3-x if 1 < x < 2
  2. B2 2-x if 1 < x < 2
  3. C2 x-1 x-2 if x > 2
  4. D2 x-1 x+2 if x > 2 .

Correct answer

B. 2 2-x if 1 < x < 2

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