Theory of Equations 1 Question 40

41. If 2+i3 is a root of the equation x2+px+q=0, where p and q are real, then (p,q)=(,).

(1982, 2M)

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Solution:

  1. If 2+i3 is one of the root of x2+px+q=0. Then, other root is 2i3.

p=2+i3+2i3=4 and q=(2+i3)(2i3)=7(p,q)=(4,7)



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