What two numbers multiply to 690 and add up to -691?

Here we answer the question: "What two numbers multiply to 690 and add up to -691?"

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 -691:

-690 × -1 = 690
-690 + -1 = -691

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

x² - 691x + 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 -691, you know that the following is true:

x² - 691x + 690 = (x - 690 ) (x - 1)

Multiply To One Number and Add Up To Another
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