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Question

If x2hx21=0 , x23hx+35=0 (h>0) has a common root, then the value of h is equal to


A

1

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B

2

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C

3

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D

4

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Solution

The correct option is D

4


Subtracting, we get 2hx = 56 or hx = 28

Putting in any, x2=49

[28h]2 = 72 ⇒ h = 4(h > 0)


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