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If one root of the equation x^2+p x+12=0 is 4 , while the equation x^2+p x+q=0 has equal roots, then the value of ' q ' is

Options

  1. A49 4
  2. B4
  3. C3
  4. D12

Correct answer

A. 49 4

Step-by-step solution

Since 4 is one of the root of x^2+p x+12=0 16+4 p+12=0 p=-7 and equation x^2+p x+q=0 has equal roots D=49-4 q=0 q= 49 4

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