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f(2)=2-6
We move all terms to the left:
f(2)-(2-6)=0
We add all the numbers together, and all the variables
f2-(-4)=0
We add all the numbers together, and all the variables
f^2+4=0
a = 1; b = 0; c = +4;
Δ = b2-4ac
Δ = 02-4·1·4
Δ = -16
Delta is less than zero, so there is no solution for the equation
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