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3-3N^2+2N=30
We move all terms to the left:
3-3N^2+2N-(30)=0
We add all the numbers together, and all the variables
-3N^2+2N-27=0
a = -3; b = 2; c = -27;
Δ = b2-4ac
Δ = 22-4·(-3)·(-27)
Δ = -320
Delta is less than zero, so there is no solution for the equation
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