The area of the triangle formed by the lines $y = 4$, $x/5 + y/4 = 1$ and $x/5 - y/8 = 1$ is

If the roots of the quadratic equation $3x^2 - 2x - 1= 0$ are the intercepts of a line, then the line can be

If points A(1,6), B(5,2) and C(12,9) are three of the vertices of the parallelogram ABCD, then the equation of diagonal BD will be