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AP EAMCET2002MathematicsComplex Number

If 1-i is a root of the equation x^2+a x+b=0 then b is equal to

Options

  1. A1
  2. B-1
  3. C-2
  4. D2

Correct answer

D. 2

Step-by-step solution

Since 1-i is a ront of the equation x^2+9 x+b=0 then another root will be 1+i , also, product of roots =b array rlrl & & (1+i)(1-i) & =b & 1+1 & =b b=2 array

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