A parabola has equation $y = 2x^2 - 8x$. Factorise and use your result to sketch it, labelling the

Question

A parabola has equation $y = 2x^2 - 8x$. Factorise and use your result to sketch it, labelling the roots and turning point.[4]

Accepted Answer

$y=x(x-8)$; roots $(0,0)$, $(8,0)$; turning point $(4,-16)$.

Functions and Graphs