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If the equations x^(2) - ax + b = 0 and ...

If the equations `x^(2) - ax + b = 0 and x^(2) + bx - a = 0` have a common root, then

A

a=b

B

a+b=0

C

a+b=1

D

a-b=1

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The correct Answer is:
D
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