What two numbers multiply to -640 and add up to 54?




Here we answer the question: "What two numbers multiply to -640 and add up to 54?"

The answer to your question is:

-10 and 64


Below we illustrate and prove that -10 and 64 multiply to -640 and add up to 54:

-10 × 64 = -640
-10 + 64 = 54

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

x2 + 54x - 640 = 0

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

(x - 10 ) (x + 64)

To summarize, since -10 and 64 multiply to -640 and add up 54, you know that the following is true:

x2 + 54x - 640 = (x - 10 ) (x + 64)


Multiply To One Number and Add Up To Another
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