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xy = 840
x+ y = -2
y = -2-x
x(-2-x) = 840
-2x -x^2 -840 = 0
x^2 +2x + 840 = 0
use quadratic formula:
X = -1-28.965i
Y = -1 +28.965i
i is imaginary and i squared -= -1
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Earn +20 ptsQ: What two numbers multiply to get 840 and add up to negative 2?
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