What two numbers multiply to -780 and add up to 4?




Here we answer the question: "What two numbers multiply to -780 and add up to 4?"

The answer to your question is:

-26 and 30


Below we illustrate and prove that -26 and 30 multiply to -780 and add up to 4:

-26 × 30 = -780
-26 + 30 = 4

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

x2 + 4x - 780 = 0

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

(x - 26 ) (x + 30)

To summarize, since -26 and 30 multiply to -780 and add up 4, you know that the following is true:

x2 + 4x - 780 = (x - 26 ) (x + 30)


Multiply To One Number and Add Up To Another
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