WAEC - Mathematics (1998 - No. 29)
The graph is that of the quadratic expression
\(y=x^2 + x - 2\)
\(y=x^2 - x + 2\)
\(y=x^2 - x - 2\)
\(y=x + x + 2\)
\(y=x^2 - 2 x - 2\)
解释
The curve cuts the x-axis at x = -1 and x = 2
(x + 1)(x - 2) = 0
x\(^2\) - 2x + x - 2 = 0
x\(^2\) - x - 2 = 0