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That doesn't factor neatly. Applying the quadratic equation, we find two imaginary solutions: (9 plus or minus 9i times the square root of 3) divided by 2

y = 4.5 + 7.794228634059948i
y = 4.5 - 7.794228634059948i

where i is the square root of negative one.

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Q: What is the factor trinomial of y2 -9y 81?
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