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B
both negative
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C
both positive
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D
none of these
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Solution
The correct option is A of opposite signs The given equation is 3x2−2x−6=0.
For a quadratic equation ax2+bx+c=0, if ac<0 then the roots are of opposite signs.
Here ac=−18 ⇒−18<0 ⇒ The roots are of opposite signs