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:

-4 and 161

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

-4 × 161 = -644
-4 + 161 = 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 - 4 ) (x + 161)

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

x² + 157x - 644 = (x - 4 ) (x + 161)

Multiply To One Number and Add Up To Another
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