# How do you find the zeros, if any, of #y= -4x^2 - 8 #using the quadratic formula?

##### 2 Answers

#### Answer:

Since

However the quadratic formula can be used to determine the Complex zeros:

#### Explanation:

The quadratic formula tells us that for a quadratic in the form:

the zeros occur at

Converting the given

into the required form:

The zeros occur at

#### Answer:

There is no 'Real Number' solution for

However there is a solution for

The solution for

#### Explanation:

The x-intercepts occur at the points where the graph crosses the x-axis. This is when y=0.

Given:

Substitute 0 for y giving:

Multiply both sides by

Subtract 8 from both sides

But

Divide both sides by 4

But

Take the square root of each side

There is no 'Real Number' solution to

However there is a solution within the set of numbers called complex numbers and that is