# How do you find the axis of symmetry, and the maximum or minimum value of the function #y= 2x^2 + 12x-11#?

##### 1 Answer

Jan 30, 2016

Axis of symmetry

Minimum

#### Explanation:

The

Write as;

Consider the

Multiply this by negative half:

This turns out to be

So the

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is also the x-value for the minimum

So by substituting it back into the original equation we find the corresponding value for y