What two numbers multiply to -688 and add up to -168?

Here we answer the question: "What two numbers multiply to -688 and add up to -168?"

The answer to your question is:

-172 and 4

Below we illustrate and prove that -172 and 4 multiply to -688 and add up to -168:

-172 × 4 = -688
-172 + 4 = -168

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

x² - 168x - 688 = 0

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

(x - 172 ) (x + 4)

To summarize, since -172 and 4 multiply to -688 and add up -168, you know that the following is true:

x² - 168x - 688 = (x - 172 ) (x + 4)

Multiply To One Number and Add Up To Another
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