09 Rolle's theorem trick | if 2a+3b+6c=0, then the equation ax^2+bx+c=0 has at least one root in

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if 2a+3b+6c=0, then the equation
ax^2+bx+c=0 has at least one root in
(0,1)
(0,3)
(0,2)
(1,2)