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use equations like this...
xy = 18
x + y = -25
solve for y in one of the equations and then substitute.
y = 18/x
x + (18/x) = -25
x2 + 18 = -25x
x2 + 25x + 18 = 0
use quadratic equation to find the answer...
x = -24.25727602 and -0.742023985
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Earn +20 ptsQ: What times what is 18 that adds up to -25?
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