What two numbers multiply to -640 and add up to -24?




Here we answer the question: "What two numbers multiply to -640 and add up to -24?"

The answer to your question is:

-40 and 16


Below we illustrate and prove that -40 and 16 multiply to -640 and add up to -24:

-40 × 16 = -640
-40 + 16 = -24

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

x2 - 24x - 640 = 0

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

(x - 40 ) (x + 16)

To summarize, since -40 and 16 multiply to -640 and add up -24, you know that the following is true:

x2 - 24x - 640 = (x - 40 ) (x + 16)


Multiply To One Number and Add Up To Another
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