What two numbers multiply to -40 and add up to -18?

Here we answer the question: "What two numbers multiply to -40 and add up to -18?"

The answer to your question is:

-20 and 2

Below we illustrate and prove that -20 and 2 multiply to -40 and add up to -18:

-20 × 2 = -40
-20 + 2 = -18

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

x² - 18x - 40 = 0

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

(x - 20 ) (x + 2)

To summarize, since -20 and 2 multiply to -40 and add up -18, you know that the following is true:

x² - 18x - 40 = (x - 20 ) (x + 2)

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.