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Question

If one root of the quadratic equation 2x2+ax6=0 is 2, find the value of a.


A

-1

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B

3

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C

5

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D

-5

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Solution

The correct option is A

-1


Since, x = 2 is a root of the given equation 2x2+ax6=0

2(2)2+a×26=0

8+2a6=0

2a=2

a=1


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