What two numbers multiply to 989 and add up to -990?

Here we answer the question: "What two numbers multiply to 989 and add up to -990?"

The answer to your question is:

-989 and -1

Below we illustrate and prove that -989 and -1 multiply to 989 and add up to -990:

-989 × -1 = 989
-989 + -1 = -990

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

x² - 990x + 989 = 0

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

(x - 989 ) (x - 1)

To summarize, since -989 and -1 multiply to 989 and add up -990, you know that the following is true:

x² - 990x + 989 = (x - 989 ) (x - 1)

Multiply To One Number and Add Up To Another
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