What two numbers multiply to -315 and add up to 6?

Here we answer the question: "What two numbers multiply to -315 and add up to 6?"

The answer to your question is:

-15 and 21

Below we illustrate and prove that -15 and 21 multiply to -315 and add up to 6:

-15 × 21 = -315
-15 + 21 = 6

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

x² + 6x - 315 = 0

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

(x - 15 ) (x + 21)

To summarize, since -15 and 21 multiply to -315 and add up 6, you know that the following is true:

x² + 6x - 315 = (x - 15 ) (x + 21)

Multiply To One Number and Add Up To Another
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