What two numbers multiply to -644 and add up to -157?

Here we answer the question: "What two numbers multiply to -644 and add up to -157?"

The answer to your question is:

-161 and 4

Below we illustrate and prove that -161 and 4 multiply to -644 and add up to -157:

-161 × 4 = -644
-161 + 4 = -157

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

x² - 157x - 644 = 0

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

(x - 161 ) (x + 4)

To summarize, since -161 and 4 multiply to -644 and add up -157, you know that the following is true:

x² - 157x - 644 = (x - 161 ) (x + 4)

Multiply To One Number and Add Up To Another
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