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Question

The quadratic equation which has D = 0 and a root as 110 is

A
x220x100=0
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B
x2100x100=0
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C
100x220x+1=0
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D
100x220x+100=0
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Solution

The correct option is C 100x220x+1=0
Since D = 0, the quadratic equation has roots which are real and equal.

The roots of the equation are 110, 110

Sum of the roots =110+110=15 ,

Product of the roots =110×110=1100

So the required quadratic equation is:

x215x+1100=0

100x220x+1=0


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