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14. Quadratic Equations
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Q25 of 78 Page 14

Mark the Correct alternative in the following:

The equation of the smallest degree with real coefficients having 1 + i as one of the roots is


for the complex roots it will exists in pair.

Hence the roots are 1+i and 1-i


Formula for quadratic equation is (x-a) (x-b) = 0


(x-1-i) (x-1+i) = 0


x2-x+ix-x+1-i-ix+i-i2=0


x2-2x+2 = 0.

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21

Mark the Correct alternative in the following:

If α, β are the roots of the equation , then are the roots of the equation


22

Mark the Correct alternative in the following:

If the difference of the roots of is unity, then


23

Mark the Correct alternative in the following:

If α, β are the roots of the equation , then


24

Mark the Correct alternative in the following:

The least value of k which makes the roots of the equation imaginary is


Questions · 78
14. Quadratic Equations
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