What two numbers multiply to 640 and add up to -133?

Here we answer the question: "What two numbers multiply to 640 and add up to -133?"

The answer to your question is:

-128 and -5

Below we illustrate and prove that -128 and -5 multiply to 640 and add up to -133:

-128 × -5 = 640
-128 + -5 = -133

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

x² - 133x + 640 = 0

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

(x - 128 ) (x - 5)

To summarize, since -128 and -5 multiply to 640 and add up -133, you know that the following is true:

x² - 133x + 640 = (x - 128 ) (x - 5)

Multiply To One Number and Add Up To Another
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