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:

-121 and -7

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

-121 × -7 = 847
-121 + -7 = -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 - 121 ) (x - 7)

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

x² - 128x + 847 = (x - 121 ) (x - 7)

Multiply To One Number and Add Up To Another
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