What two numbers multiply to -640 and add up to 12?




Here we answer the question: "What two numbers multiply to -640 and add up to 12?"

The answer to your question is:

-20 and 32


Below we illustrate and prove that -20 and 32 multiply to -640 and add up to 12:

-20 × 32 = -640
-20 + 32 = 12

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

x2 + 12x - 640 = 0

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

(x - 20 ) (x + 32)

To summarize, since -20 and 32 multiply to -640 and add up 12, you know that the following is true:

x2 + 12x - 640 = (x - 20 ) (x + 32)


Multiply To One Number and Add Up To Another
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