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Question

If roots of the equation 2x2+3(k2)x+4k=15x are negative of each other, then k equals

A
4
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B
2
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C
0
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D
7
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Solution

The correct option is D 7
Given quadratic equation
2x2+3(k2)x+4k=15x
2x2+3(k7)x+4k=0
Let α,α be the roots
αα=3(k7)
k=7

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