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[" (3) real roots "],[" 16.If "a in(-1,1...

[" (3) real roots "],[" 16.If "a in(-1,1)" ,then roots of the quadratic equation "],[(a-1)x^(2)+ax+sqrt(1-a^(2))=0" are "],[[" (1) real "," (2) imaginary "],[" (3) both equal "," (4) none of these "]]

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