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If x^(2) +ax +10= 0 and x^(2) + bx- 10= ...

If `x^(2) +ax +10= 0 and x^(2) + bx- 10= 0` have a common root, then `a^(2)-b^(2)` is equal to

A

40

B

10

C

20

D

30

Text Solution

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The correct Answer is:
A
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