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a(2)=3(0.04)2-1
We move all terms to the left:
a(2)-(3(0.04)2-1)=0
We add all the numbers together, and all the variables
a^2+0.76=0
a = 1; b = 0; c = +0.76;
Δ = b2-4ac
Δ = 02-4·1·0.76
Δ = -3.04
Delta is less than zero, so there is no solution for the equation
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