Question

In Q. No. 15, write the sign of c.

Answer 1

The parabola  `y = ax^2 + bx + c` cuts y-axis at P which lies on OY. 

Putting  x = 0  in  `y = ax^2 + bx + c` , we get y=c. So the coordinates of P are (0,c). Clearly, P lies on OY. Therefore  C < 0.