What two numbers multiply to -680 and add up to 77?




Here we answer the question: "What two numbers multiply to -680 and add up to 77?"

The answer to your question is:

-8 and 85


Below we illustrate and prove that -8 and 85 multiply to -680 and add up to 77:

-8 × 85 = -680
-8 + 85 = 77

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

x2 + 77x - 680 = 0

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

(x - 8 ) (x + 85)

To summarize, since -8 and 85 multiply to -680 and add up 77, you know that the following is true:

x2 + 77x - 680 = (x - 8 ) (x + 85)


Multiply To One Number and Add Up To Another
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