What two numbers multiply to -639 and add up to 62?

Here we answer the question: "What two numbers multiply to -639 and add up to 62?"

The answer to your question is:

-9 and 71

Below we illustrate and prove that -9 and 71 multiply to -639 and add up to 62:

-9 × 71 = -639
-9 + 71 = 62

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

x² + 62x - 639 = 0

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

(x - 9 ) (x + 71)

To summarize, since -9 and 71 multiply to -639 and add up 62, you know that the following is true:

x² + 62x - 639 = (x - 9 ) (x + 71)

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.