What two numbers multiply to 640 and add up to -164?

Here we answer the question: "What two numbers multiply to 640 and add up to -164?"

The answer to your question is:

-160 and -4

Below we illustrate and prove that -160 and -4 multiply to 640 and add up to -164:

-160 × -4 = 640
-160 + -4 = -164

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

x² - 164x + 640 = 0

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

(x - 160 ) (x - 4)

To summarize, since -160 and -4 multiply to 640 and add up -164, you know that the following is true:

x² - 164x + 640 = (x - 160 ) (x - 4)

Multiply To One Number and Add Up To Another
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