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[" (c) Three "],[" 28.A value of b for w...

[" (c) Three "],[" 28.A value of b for which the equations "],[x^(2)+bx-1=0],[x^(2)+x+b=0],[" have one root in common is "],[[" (a) "-sqrt(2)," (b) "-sqrt(3)],[" (c) "sqrt(5)," (d) "sqrt(2)]]

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