What is the standard form of y= (x - 8) (4x+1) y=(x8)(4x+1)?

1 Answer
Mar 3, 2016

The quadratic form is y = 4x^2-31x-84x231x8.
If it is for making a graph, the standard form is
(x-31/8)^2 = 4(1/16)(y+993/16)(x318)2=4(116)(y+99316).

Explanation:

The equation represents the parabola with .
Vertex: (31/8, -993/16)(318,99316),
Axis: Parallel to +ve y-axis,
Focus at (31/8, -993/16 +1/16)(318,99316+116) and
Directrix along x = (31/8, -993/16 -1/16) (318,99316116).