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4-x^2=6
We move all terms to the left:
4-x^2-(6)=0
We add all the numbers together, and all the variables
-1x^2-2=0
a = -1; b = 0; c = -2;
Δ = b2-4ac
Δ = 02-4·(-1)·(-2)
Δ = -8
Delta is less than zero, so there is no solution for the equation
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