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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

If equals the integral solution of inequality 4x^2 - 16x + 15 < 0 and equals to the slope of the bisector of the first quadrant, then ( + ) ( - ) is equal to :

Options

  1. A-3/5
  2. B-4/5
  3. C2/ 2
  4. D3.

Correct answer

B. -4/5

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