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The range of a for which the equation x^...

The range of `a` for which the equation `x^2+ax-4=0` has its smaller root in the interval `(-1,2)i s ` a. `(-oo,-3)` b. `(0,3)` c. `(0,oo)` d. `(-oo,-3)uu(0,oo)`

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