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5x^2=-333
We move all terms to the left:
5x^2-(-333)=0
We add all the numbers together, and all the variables
5x^2+333=0
a = 5; b = 0; c = +333;
Δ = b2-4ac
Δ = 02-4·5·333
Δ = -6660
Delta is less than zero, so there is no solution for the equation
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