What two numbers multiply to 689 and add up to -690?

Here we answer the question: "What two numbers multiply to 689 and add up to -690?"

The answer to your question is:

-689 and -1

Below we illustrate and prove that -689 and -1 multiply to 689 and add up to -690:

-689 × -1 = 689
-689 + -1 = -690

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

x² - 690x + 689 = 0

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

(x - 689 ) (x - 1)

To summarize, since -689 and -1 multiply to 689 and add up -690, you know that the following is true:

x² - 690x + 689 = (x - 689 ) (x - 1)

Multiply To One Number and Add Up To Another
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