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

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

The answer to your question is:

-690 and 1

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

-690 × 1 = -690
-690 + 1 = -689

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

x² - 689x - 690 = 0

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

(x - 690 ) (x + 1)

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

x² - 689x - 690 = (x - 690 ) (x + 1)

Multiply To One Number and Add Up To Another
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