What two numbers multiply to -420 and add up to 64?

Here we answer the question: "What two numbers multiply to -420 and add up to 64?"

The answer to your question is:

-6 and 70

Below we illustrate and prove that -6 and 70 multiply to -420 and add up to 64:

-6 × 70 = -420
-6 + 70 = 64

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

x² + 64x - 420 = 0

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

(x - 6 ) (x + 70)

To summarize, since -6 and 70 multiply to -420 and add up 64, you know that the following is true:

x² + 64x - 420 = (x - 6 ) (x + 70)

Multiply To One Number and Add Up To Another
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