What two numbers multiply to -9 and add up to 0?

Here we answer the question: "What two numbers multiply to -9 and add up to 0?"

The answer to your question is:

-3 and 3

Below we illustrate and prove that -3 and 3 multiply to -9 and add up to 0:

-3 × 3 = -9
-3 + 3 = 0

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x² + 0x - 9 = 0

If so, the solution to factor the quadratic equation above is:

(x - 3 ) (x + 3)

To summarize, since -3 and 3 multiply to -9 and add up 0, you know that the following is true:

x² + 0x - 9 = (x - 3 ) (x + 3)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.