Here we answer the question: "What two numbers multiply to -840 and add up to -58?"
The answer to your question is:
-70 and 12
Below we illustrate and prove that -70 and 12 multiply to -840 and add up to -58:
-70 × 12 = -840
-70 + 12 = -58
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 58x - 840 = 0
If so, the solution to factor the quadratic equation above is:
(x - 70 ) (x + 12)
To summarize, since -70 and 12 multiply to -840 and add up -58, you know that the following is true:
x2 - 58x - 840 = (x - 70 ) (x + 12)
Multiply To One Number and Add Up To Another
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