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x^2+72=x
We move all terms to the left:
x^2+72-(x)=0
We add all the numbers together, and all the variables
x^2-1x+72=0
a = 1; b = -1; c = +72;
Δ = b2-4ac
Δ = -12-4·1·72
Δ = -287
Delta is less than zero, so there is no solution for the equation
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