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3n^2+5=n^2-7n-18
We move all terms to the left:
3n^2+5-(n^2-7n-18)=0
We get rid of parentheses
3n^2-n^2+7n+18+5=0
We add all the numbers together, and all the variables
2n^2+7n+23=0
a = 2; b = 7; c = +23;
Δ = b2-4ac
Δ = 72-4·2·23
Δ = -135
Delta is less than zero, so there is no solution for the equation
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