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12x-45-x^2=0
We add all the numbers together, and all the variables
-1x^2+12x-45=0
a = -1; b = 12; c = -45;
Δ = b2-4ac
Δ = 122-4·(-1)·(-45)
Δ = -36
Delta is less than zero, so there is no solution for the equation
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