What is the standard form of  y= (x-6)(x+18) ?

Jan 12, 2016

$y = {x}^{2} + 12 x - 108$

Explanation:

Multiply out the brackets to obtain :

$y = {x}^{2} + 12 x - 108$.

This standard form represents a 2nd degree quadratic function (of form $y = a {x}^{2} + b x + c$) and its graph would hence be a parabola as shown below

graph{x^2+12x-108 [-304.3, 304, -152.2, 152.2]}