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Question

If one root of the equation x2+(1−3i)x−2(1+i)=0 is −1+i, then the other root is

A
1i
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B
1i2
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C
i
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D
2i
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Solution

The correct option is D 2i
x2+(13i)x2(1+i)=0
One root =1+i
Sum of roots =3i1
2nd root =x
1+i+x=3i1
x=3i1+1i
x=2i
other root =2i

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