What two numbers multiply to -644 and add up to 5?




Here we answer the question: "What two numbers multiply to -644 and add up to 5?"

The answer to your question is:

-23 and 28


Below we illustrate and prove that -23 and 28 multiply to -644 and add up to 5:

-23 × 28 = -644
-23 + 28 = 5

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

x2 + 5x - 644 = 0

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

(x - 23 ) (x + 28)

To summarize, since -23 and 28 multiply to -644 and add up 5, you know that the following is true:

x2 + 5x - 644 = (x - 23 ) (x + 28)


Multiply To One Number and Add Up To Another
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