What two numbers multiply to -639 and add up to 210?




Here we answer the question: "What two numbers multiply to -639 and add up to 210?"

The answer to your question is:

-3 and 213


Below we illustrate and prove that -3 and 213 multiply to -639 and add up to 210:

-3 × 213 = -639
-3 + 213 = 210

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

x2 + 210x - 639 = 0

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

(x - 3 ) (x + 213)

To summarize, since -3 and 213 multiply to -639 and add up 210, you know that the following is true:

x2 + 210x - 639 = (x - 3 ) (x + 213)


Multiply To One Number and Add Up To Another
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