What two numbers multiply to -5 and add up to -4?

Here we answer the question: "What two numbers multiply to -5 and add up to -4?"

The answer to your question is:

-5 and 1

Below we illustrate and prove that -5 and 1 multiply to -5 and add up to -4:

-5 × 1 = -5
-5 + 1 = -4

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

x² - 4x - 5 = 0

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

(x - 5 ) (x + 1)

To summarize, since -5 and 1 multiply to -5 and add up -4, you know that the following is true:

x² - 4x - 5 = (x - 5 ) (x + 1)

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.