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2-y^2=91
We move all terms to the left:
2-y^2-(91)=0
We add all the numbers together, and all the variables
-1y^2-89=0
a = -1; b = 0; c = -89;
Δ = b2-4ac
Δ = 02-4·(-1)·(-89)
Δ = -356
Delta is less than zero, so there is no solution for the equation
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