WAEC - Mathematics (2004 - No. 40)

Use the graph to answer the Question below
What are the roots of the equation x² + 3x - 4 = 0?

1, 4

-1, -4

-1, 4

-4, 1

x² + 3x – 4 = 0 has roots value at the curve makes touches with the x – axis. The curve contact is at x = -4 and +1.