logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
0 votes

If $\;1-i\;$ is a root of the equation $\;x^{2} + bx + c=0\;$ where $\;a,b \in R\;$ , then find the values of a and b .

$(a)\;2,3\qquad(b)\;0,2\qquad(c)\;-2,2\qquad(d)\;4,-2$

Can you answer this question?
 
 

1 Answer

0 votes
Answer : -2 , 2
Explanation :
Sum of roots $\; \large\frac{-a}{1} = (1-i)+(1+i)$
$a=-2$
(Since non real complex roots occur in conjugate pairs )
Product of roots $\;\large\frac{b}{1}=(1-i)(1+i)$ => $\;b=2$
answered Apr 18, 2014 by yamini.v
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...