What two numbers multiply to -780 and add up to 68?

Here we answer the question: "What two numbers multiply to -780 and add up to 68?"

The answer to your question is:

-10 and 78

Below we illustrate and prove that -10 and 78 multiply to -780 and add up to 68:

-10 × 78 = -780
-10 + 78 = 68

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

x² + 68x - 780 = 0

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

(x - 10 ) (x + 78)

To summarize, since -10 and 78 multiply to -780 and add up 68, you know that the following is true:

x² + 68x - 780 = (x - 10 ) (x + 78)

Multiply To One Number and Add Up To Another
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