What two numbers multiply to -900 and add up to -91?

Here we answer the question: "What two numbers multiply to -900 and add up to -91?"

The answer to your question is:

-100 and 9

Below we illustrate and prove that -100 and 9 multiply to -900 and add up to -91:

-100 × 9 = -900
-100 + 9 = -91

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

x² - 91x - 900 = 0

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

(x - 100 ) (x + 9)

To summarize, since -100 and 9 multiply to -900 and add up -91, you know that the following is true:

x² - 91x - 900 = (x - 100 ) (x + 9)

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.