SOLUTION: what is the value of b if (4+ or - i) are complex roots of 2x squared+bx+15=0

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Question 553871: what is the value of b if (4+ or - i) are complex roots of 2x squared+bx+15=0
Answer by prateekagrawal(56) About Me  (Show Source):
You can put this solution on YOUR website!
sum of roots of a quadratic equation = -b/a
here b=b and a=2
and sum of roots= 4+i+4-i= 8
so, 8=+-b%2F2%0D%0A16=-b%0D%0Ab=-16
is the answer.