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

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Answer 1 · 2016-01-12T09:39:19

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

Multiply out the brackets to obtain :

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

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

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

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