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Sarah_Marie
Oct 27, 2010, 07:21 AM
For what value of “b” will the line y=-2x+b be tangent to the parabola y=3x^2+4x-1 ?

Unknown008
Oct 27, 2010, 09:07 AM
1. Equate both equations.
2. Use the fact that for the new curve that you got to have equal roots, b^2-4ac = 0

Now, can you tell me why is that so, since you didn't posted your attempt?