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Q.

The quadratic equation whose one root is −3+i74   is

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a

2x2−3x +2=0

b

2x2+3x−2=0

c

2x2−3x−2=0

d

2x2+3x +2=0

answer is D.

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Detailed Solution

α=−3+i74,β=−3−i74 α+β=−32 , αβ=1 Equation is x2+32x+1=0  ⇒ 2x2+3x+2=0
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