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# Quadratic question help

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A line has equation y = 2x − 7 and a curve has equation y = x
2 − 4x + c, where c is a constant. Find
the set of possible values of c for which the line does not intersect the curve.
2. What have you tried?
3. (Original post by alow)
What have you tried?
I don't get the equation, if we equate then we get a point which lies on both, but we need the opposite, please solve and tell why
4. (Original post by Revision 99)
I don't get the equation, if we equate then we get a point which lies on both, but we need the opposite, please solve and tell why
So from that you know the values of c for which the line and curve intersect...

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