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If the roots of the quadratic equation x^2+p x+q=0 are 30^ and 15^ , respectively then the value of 2+q-p is

Options

  1. A2
  2. B3
  3. C0
  4. D1

Correct answer

B. 3

Step-by-step solution

x^2+p x+q=0 30^ + 15^ =-p 30^ 15^ =q 45^ = 30^ + 15^ 1- 30^ 15^ = -p 1-q =1 -p=1-q q-p=1 2+q-p=3 .

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