What two numbers multiply to -870 and add up to -77?




Here we answer the question: "What two numbers multiply to -870 and add up to -77?"

The answer to your question is:

-87 and 10


Below we illustrate and prove that -87 and 10 multiply to -870 and add up to -77:

-87 × 10 = -870
-87 + 10 = -77

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

x2 - 77x - 870 = 0

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

(x - 87 ) (x + 10)

To summarize, since -87 and 10 multiply to -870 and add up -77, you know that the following is true:

x2 - 77x - 870 = (x - 87 ) (x + 10)


Multiply To One Number and Add Up To Another
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