What two numbers multiply to 847 and add up to 128?

Here we answer the question: "What two numbers multiply to 847 and add up to 128?"

The answer to your question is:

7 and 121

Below we illustrate and prove that 7 and 121 multiply to 847 and add up to 128:

7 × 121 = 847
7 + 121 = 128

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

x² + 128x + 847 = 0

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

(x + 7 ) (x + 121)

To summarize, since 7 and 121 multiply to 847 and add up 128, you know that the following is true:

x² + 128x + 847 = (x + 7 ) (x + 121)

Multiply To One Number and Add Up To Another
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