What is the vertex of the graph of y = x2 + 4x? (–2, –12) (–2, –8) (–2, –6) (–2, –4)

The vertex is (-2,-4)

Step-by-step explanation:

If we have an equation as:

Where a is the constant beside , b is the constant beside and c is the constant that is alone. The vertex of the graph describe by this equation is the point (x,y), where x is calculate as:

And y is the founded replacing the value of x on the initial equation.

In this case, we have the equation

So, a is equal to 1, b is equal to 4 and c is equal to 0. Replacing this values for found the vertex, we get:

Them, the value of y is founded replacing -2 on the initial equation as:

Therefore, the vertex of the graph describe by the equation is the point (-2,-4)

56

step-by-step explanation: