What two numbers multiply to -420 and add up to 79?

Here we answer the question: "What two numbers multiply to -420 and add up to 79?"

The answer to your question is:

-5 and 84

Below we illustrate and prove that -5 and 84 multiply to -420 and add up to 79:

-5 × 84 = -420
-5 + 84 = 79

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

x² + 79x - 420 = 0

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

(x - 5 ) (x + 84)

To summarize, since -5 and 84 multiply to -420 and add up 79, you know that the following is true:

x² + 79x - 420 = (x - 5 ) (x + 84)

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.