Question 1116441
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y^2 - 18y = -82


y^2 - 2*9y + 9^2 = -82 + 9^2


(y-9)^2 = -1


y- 9 = +/- {{{sqrt(-1)}}}


y - 9 = +/-i


y = 9 +/- i.
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Solved, and two complex solutions are found.