What two numbers multiply to 780 and add up to 77?

Here we answer the question: "What two numbers multiply to 780 and add up to 77?"

The answer to your question is:

12 and 65

Below we illustrate and prove that 12 and 65 multiply to 780 and add up to 77:

12 × 65 = 780
12 + 65 = 77

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

x² + 77x + 780 = 0

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

(x + 12 ) (x + 65)

To summarize, since 12 and 65 multiply to 780 and add up 77, you know that the following is true:

x² + 77x + 780 = (x + 12 ) (x + 65)

Multiply To One Number and Add Up To Another
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