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n2=3n-30
We move all terms to the left:
n2-(3n-30)=0
We add all the numbers together, and all the variables
n^2-(3n-30)=0
We get rid of parentheses
n^2-3n+30=0
a = 1; b = -3; c = +30;
Δ = b2-4ac
Δ = -32-4·1·30
Δ = -111
Delta is less than zero, so there is no solution for the equation
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