What two numbers multiply to -648 and add up to 73?

Here we answer the question: "What two numbers multiply to -648 and add up to 73?"

The answer to your question is:

-8 and 81

Below we illustrate and prove that -8 and 81 multiply to -648 and add up to 73:

-8 × 81 = -648
-8 + 81 = 73

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

x² + 73x - 648 = 0

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

(x - 8 ) (x + 81)

To summarize, since -8 and 81 multiply to -648 and add up 73, you know that the following is true:

x² + 73x - 648 = (x - 8 ) (x + 81)

Multiply To One Number and Add Up To Another
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