What two numbers multiply to -630 and add up to -9?




Here we answer the question: "What two numbers multiply to -630 and add up to -9?"

The answer to your question is:

-30 and 21


Below we illustrate and prove that -30 and 21 multiply to -630 and add up to -9:

-30 × 21 = -630
-30 + 21 = -9

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

x2 - 9x - 630 = 0

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

(x - 30 ) (x + 21)

To summarize, since -30 and 21 multiply to -630 and add up -9, you know that the following is true:

x2 - 9x - 630 = (x - 30 ) (x + 21)


Multiply To One Number and Add Up To Another
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