# What is the vertex of # y= -3x^2-x-2(3x+5)^2#?

##### 1 Answer

The vertex is at

#### Explanation:

You can find the vertex from ANY of the three forms of a parabola: Standard, factored and vertex. Since it is simpler I'm going to converted this into standard form.

(you can prove this by either completing the square in general or averaging the roots found from the quadratic equation)

and then substituted it back into the expression to find

The vertex is at