What two numbers multiply to -670 and add up to 669?

Here we answer the question: "What two numbers multiply to -670 and add up to 669?"

The answer to your question is:

-1 and 670

Below we illustrate and prove that -1 and 670 multiply to -670 and add up to 669:

-1 × 670 = -670
-1 + 670 = 669

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

x² + 669x - 670 = 0

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

(x - 1 ) (x + 670)

To summarize, since -1 and 670 multiply to -670 and add up 669, you know that the following is true:

x² + 669x - 670 = (x - 1 ) (x + 670)

Multiply To One Number and Add Up To Another
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