What two numbers multiply to 90 and add up to -19?

Here we answer the question: "What two numbers multiply to 90 and add up to -19?"

The answer to your question is:

-10 and -9

Below we illustrate and prove that -10 and -9 multiply to 90 and add up to -19:

-10 × -9 = 90
-10 + -9 = -19

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

x² - 19x + 90 = 0

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

(x - 10 ) (x - 9)

To summarize, since -10 and -9 multiply to 90 and add up -19, you know that the following is true:

x² - 19x + 90 = (x - 10 ) (x - 9)

Multiply To One Number and Add Up To Another
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