What two numbers multiply to 128 and add up to -66?

Here we answer the question: "What two numbers multiply to 128 and add up to -66?"

The answer to your question is:

-64 and -2

Below we illustrate and prove that -64 and -2 multiply to 128 and add up to -66:

-64 × -2 = 128
-64 + -2 = -66

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

x² - 66x + 128 = 0

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

(x - 64 ) (x - 2)

To summarize, since -64 and -2 multiply to 128 and add up -66, you know that the following is true:

x² - 66x + 128 = (x - 64 ) (x - 2)

Multiply To One Number and Add Up To Another
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