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[" If the roots of the equation "ax^(2)+...

[" If the roots of the equation "ax^(2)+bx+c=0" are in the ratio "],[3:4" then "],[[" (a) "49b^(2)=12bc," (b) "12b^(2)=49ac],[" (c) "49b^(2)=ac," (d) "b^(2)=49ac]]

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