JAMB - Mathematics (1988 - No. 11)
The solutions of x2 - 2x - 1 = 0 are the points of intersection of two graphs. if one of the graphs is y = 2 + x - x2, find the second graph
y = 1 - x
y = 1 + x
y = x - 1
y = 3x + 3
คำอธิบาย
The second graph is
\((x^{2} - 2x - 1) + (2 + x - x^{2})\)
= \(1 - x\)