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8n^2-7=-47
We move all terms to the left:
8n^2-7-(-47)=0
We add all the numbers together, and all the variables
8n^2+40=0
a = 8; b = 0; c = +40;
Δ = b2-4ac
Δ = 02-4·8·40
Δ = -1280
Delta is less than zero, so there is no solution for the equation
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