What two numbers multiply to -689 and add up to -40?




Here we answer the question: "What two numbers multiply to -689 and add up to -40?"

The answer to your question is:

-53 and 13


Below we illustrate and prove that -53 and 13 multiply to -689 and add up to -40:

-53 × 13 = -689
-53 + 13 = -40

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

x2 - 40x - 689 = 0

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

(x - 53 ) (x + 13)

To summarize, since -53 and 13 multiply to -689 and add up -40, you know that the following is true:

x2 - 40x - 689 = (x - 53 ) (x + 13)


Multiply To One Number and Add Up To Another
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