What two numbers multiply to -990 and add up to 79?

Here we answer the question: "What two numbers multiply to -990 and add up to 79?"

The answer to your question is:

-11 and 90

Below we illustrate and prove that -11 and 90 multiply to -990 and add up to 79:

-11 × 90 = -990
-11 + 90 = 79

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

x² + 79x - 990 = 0

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

(x - 11 ) (x + 90)

To summarize, since -11 and 90 multiply to -990 and add up 79, you know that the following is true:

x² + 79x - 990 = (x - 11 ) (x + 90)

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.