What two numbers multiply to 900 and add up to -100?

Here we answer the question: "What two numbers multiply to 900 and add up to -100?"

The answer to your question is:

-90 and -10

Below we illustrate and prove that -90 and -10 multiply to 900 and add up to -100:

-90 × -10 = 900
-90 + -10 = -100

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

x² - 100x + 900 = 0

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

(x - 90 ) (x - 10)

To summarize, since -90 and -10 multiply to 900 and add up -100, you know that the following is true:

x² - 100x + 900 = (x - 90 ) (x - 10)

Multiply To One Number and Add Up To Another
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